The one in the south does not cast the sadows I would expect to see and it does not look like similar dark roofed buildings nearby. I think the one in the north is a tree (probably without leaves) it may be a building, but if so the footpint should be significantly smaller. Cross referencing bing is useful here. Hope this is informative.
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Published using OSMCha: https://osmcha.org/changesets/165030744

I suspect that neither of these footprints represent buildings visible in imagery.
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Published using OSMCha: https://osmcha.org/changesets/165030744

Generally adding a layer tag (over/under) is not the correct way to resolve overlap issues as they are usually caused by inaccurate geometry. If you come across overlap issues zoom to them by clicking on them and see if they can be addressed by modifying geometry. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164693122

The residential area I flagged does not contain enough buildings to be a residential area. Highways should not share nodes with landuse areas. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/162706734

All footprints you added are valid, appropriately squared and most are accurate. Hold alt to prevent your cursor from snapping to data and press d to disconnect shared nodes.
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Published using OSMCha: https://osmcha.org/changesets/164180890

Footprints are generally valid, appropriately squared and have an accurate orientation but tend to be oversized and include the shadow a building casts in its footprint size. I flagged footprints which outline multiple buildings.
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Published using OSMCha: https://osmcha.org/changesets/164133065

This footprint is valid and appropriately squared, but has a westerly bias and is oversized.
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Published using OSMCha: https://osmcha.org/changesets/164092259

Most footprints are valid; the Western two do not need to be mapped for this project. Please remember to square (q) the footprints you digitise; it's common for buildings to have square corners and it's difficult to map precise corners.
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Published using OSMCha: https://osmcha.org/changesets/164180102

The footprint I flagged has a more complex shape. Add more nodes and use the corners of the roof to map it accurately. The points you place need to be colse to square to be squared by ID editor, watch the beginer mistakes videos on the missing maps youtube chanel for more details.
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Published using OSMCha: https://osmcha.org/changesets/164090960

The footprint I flagged is likely two adjacent buildings and not one.
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Published using OSMCha: https://osmcha.org/changesets/164090679

Overall a good contribution but you mapped the light and dark side of pitched roofs (I flagged these). Keep in mind roof shapes and how the scene is lit when mapping. See how I mapped them in Changeset: 164957877
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Published using OSMCha: https://osmcha.org/changesets/160828457

Every footprint here is valid and accurate (including the round one). Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164177641

Overall a good contribution, but highways and buildings should not share nodes and the round building actually has square corners. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164177218

The round buildings you added here actually have square corners: generally buildings with (blue) metal roofs have square footprints. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164175162

All footprints valid, accurate and appropriately squared. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164176617

The footpritnt I flagged here outlines multiple buildings.
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Published using OSMCha: https://osmcha.org/changesets/159483327

I flagged some footprints which outline multiple buildings here.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/164091642

The Eastern footprint is valid and looks appropriately shaped, the orientation could be a little more accurate: zooming out gives better orientation information. The western footpritnt may actually represent a barrier like a fence or wall given that it casts shadows around its entire perimiter and nothing else is close enough to it to cast those shadows in its stead. Thanks for mapping.
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Published using OSMCha: https://osmcha.org/changesets/164925482

All footprints are valid, and all but one have been appropriately squared. They would be more accurate if they were smaller; pitched roofs tend to overhang walls, so draw at or within the edges of the roof. See how I mapped theses buildings in Changeset: 164947758.--- You appropriately modified the residential area to prevent it overlapping with footprints.--- Rather than deleting and redrawing features use the replace geometry tool (ctrl.+shift+G), or the conflation plugin to modify features while preserving their meta data and history.--- Thank you for mapping.
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Published using OSMCha: https://osmcha.org/changesets/164939416

This footprint envelopes multiple buildings. Footpritns should represent individual buildigs. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/159717682