The northern most footprint here is L shaped. I mapped it in Changeset: 164573018. Zooming out tends to give more accurate shape and orientation information. In this project if highways are in the way you can move them.
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Published using OSMCha: https://osmcha.org/changesets/161254234

All footprints here are valid and the vast majority are accurate. Thank you for your high quality conrtributions. I think that the C shaped building is actually a rectange with a ^- roof cross section. The T shaped building I think could be better mapped as two footprints becasue I cannot see the same diagonal joints in the roof like the building to its south. I made some modifications to the footprins in this changeset and uploaded them in Changeset: 164572759 & Changeset: 164572787.
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Published using OSMCha: https://osmcha.org/changesets/161254123

Western footprint is not valid. The eastern one is valid and appropriately squared but it's oversized becasue its shadow was outlined and its orientation could be more accurate. Hope this helps. Please continue mapping.
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Published using OSMCha: https://osmcha.org/changesets/164180216

All footprints you added here are valid; it's good that you accurately mapped the L shaped building. Remember to square the corners (q), and please continue mapping.
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Published using OSMCha: https://osmcha.org/changesets/164090625

OVerall a good contribution. Some of the footprints here are valid and accurate, others could have been more accurately mapped as square footprints but this is difficult to see in ESRI and only obvious when comparing with bing. Please continue mapping.
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Published using OSMCha: https://osmcha.org/changesets/164261845

It may be easier for you to search for the changeset in Open Street Map and use the edit drop down at the top of the page to open the area in ID editor.
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Published using OSMCha: https://osmcha.org/changesets/164501175

Please see Changeset: 164502845 for my mapping of this selection of buildings. View the task change-sets via task data in top right of the task window. You'll need to log into (authorise) OSMCha then repeat this step the first time you do it, to load the relevant changesets. You should be able to view the buildings by opening the changeset using ID editor (open with). Hope this helps. Thank you for your contributions.
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Published using OSMCha: https://osmcha.org/changesets/164501175

You identified buildings visible in imagery all but two cases here so the vast majority of these footprints are valid, but the footprints are not accurate and should be squared (q).
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Published using OSMCha: https://osmcha.org/changesets/164501175

The vast majority of footprints here are valid and accurate. Thank you for your attention to detail and 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/164177802

The northern most footprint outlines a building and its garden. The majority of the buildings here are valid and accurately mapped especially given that you were using the ID editor. 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/164175173

Thesse footpritns should be squared. Hold Alt to prevent your cursor from snapping to data. 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/164179146

These are temporal yurts as outlined in the project building reference guide, and should not be mapped. It not a big deal I deleted them but you don't need to spend the time or effort to map them.
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Published using OSMCha: https://osmcha.org/changesets/164176067

The footprints here are valid and appropriately squared, though they are generally oversized. Good attempt on mapping buildings you thought were L shaped; in this case they are simply quadrilateral and the ground beside them makes it appear as though the roof shape is different.
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Published using OSMCha: https://osmcha.org/changesets/164089344

This footprint appears to be East of where it should be.
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Published using OSMCha: https://osmcha.org/changesets/164088954

You added a name to this residential area. Do you know its name, or was this accidental?
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Published using OSMCha: https://osmcha.org/changesets/159483919

Valid and accurate footprints here. Hold alt to prevent your cursor from snapping.
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Published using OSMCha: https://osmcha.org/changesets/164134691

I just want to say that even if a task you submitted is invalidated that isn't neccessarily an assessment of the quality of your contributions. Tasks are evaluated for both quality and completeness. One really good indicator of what you're looking at are shadows. Sometimes different imagery sources show shadows being cast in different or even opposite directions, using that fact can help you to better interpret the imagery. I've done some mapping in the NW of this settlement and I'll post an example of my mapping in the project comments section.
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Published using OSMCha: https://osmcha.org/changesets/164186113

some of these footprints envelope multiple buildings and are therefore invalid. Footprints should represent individual buildings. 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/159483704

These footprints are generally valid though inaccurate; they should be smaller and squared. The footprint in the SE outlines multiple buidlings 1 footprint per building please: use shadows and colour to determine where one ends and the other begins. 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/164091253

Footprints here are generally valid though are a little oversized.
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Published using OSMCha: https://osmcha.org/changesets/164178470