This building (way/481787267) crosses over it self ... and that is not right. I'll leave it to you to fix.

Ok. Corrections made -
removed highway=cycleway.
added relations for mtb routes.

Added paths from strava.
Added catch all for strava heat map trails - no names but a generic for the park as a whole.

These now display on
https://mtb.waymarkedtrails.org/#?map=15!-35.1145!147.3048

Note the PMT route is the catch all.

Things to do ?

A) Introduce new relationships for named routes that are not entered yet, if possible use the ways already entered for these new routes. Where the new way uses a way that is in the catch all .. remove it from the catch all.

B) Add detail for the newly added ways.

C) if the newly entered ways are closed down .. mark them as disused:highway=path as that will tell me (and others) of the situation and stop us reentering the data.

Note https://mtb.waymarkedtrails.org/#?map=15!-35.1145!147.3048 is updated daily ... it is not good having stuff deleted for months on end. By all means correct stuff .. but try not to delete it.

Finding out who did what .. err .. and then once found are they still around, and amenable to working on fixing it?
Rather it were fixed .. as time and inclination allows. This is not my area of vast knowledge in either OSM nor familiarity with the land .. I have been through a few times but not staid for any real length of time.

I do hope my fumble fingers have not broken too much stuff along the way .. one of my reasons for chasing the errors (as called by the map rendering), penance for my possible errors.

As a NSWelshman I find the idea of an area being both a National Park and a State Forest strange in this country. However if that is the case then it should remain so in OSM. I have updated the web links for the Goodedulla_National_Park. Oh and the tag natural=forest to natural=wood as that is the present OSM tagging.
I do note that it is not unknown for both forestry and conservation to take place in the same areas .. Europe has a few of them, then again they have 'National Parks' that have had world wars fought on them.

Hi again
Relation: 2308145 tagged waterway=riverbank ... is not closed ... and looks to contain ways 172860359 and 172860350 that are both tagged (correctly I think) as wetlands.
I think the wetlands need to be made into relationship ... so that the ways can be cut up so they can be shared between the wetlands and the river bank. See what you think.

P.S. I am slowly going through the errors generated when making a map from OSM data - that is how I arrived here.

Error .. confuses me!
Relation: Develin State Forest (1481424)
Relation: Goodedulla National Park (1481425)

Are both the same! The same area should not be a national park and a state forest? Could you look at this please (I hope you are more locale than me).
Reason why I am looking here is that both relations have the same error - they include a way Way: 104639445 and that cannot be joined into a continuous segment - so I have removed it from these relations .. that could now be made simple ways.)

way/481460629 was crossing it self. I have removed the crossing and added detail from the LPI Imagery and added the source tag.

Humm looking at the history .. I would remove the relationship. The northern way I would tag as the lake, and I'd reapply the southern way as the lagoon.

Errors on relationship Lake Cakora;Cakora Lagoon (7017874, v1).

Multiple names ... the name tag should only carry one name. If there are other names .. then use alt_name,
See name=*

Next .. the ways of this relationship intersect. It looks to me like you should have one way on the outside - role outer and another way on the inside with the role inner.

The sport is on a race track .. where is the tack?
Relation: 6422036 is tagged as leisure=track.. had outers and inners .. now has one outer .. that is not closed. So the relationship is broken

Possibly this was broken before your changes? Don't know... but you certainly have not 'improved' it. It was 'good' when I left it some months ago, used the fences (that I added) + some ways IIRC.

P.S. I would not use the tag 'landuse=grass' as it makes no sense. I think what you want is 'landcover=grass'.

Congratulations.
You have removed a race track.

2 relationships .. contain no information.
3rd relation has both buildings as roofs and shop convenience.
All relationships deleted.
One way is now tagged as the roof. The other way is tagged as building retail with sop convenience. Added node - amenity=fuel, operator Woolworths.

Wetland relation/6955233 has errors... you have
2 ways tagged as outer ways .. that is the outside of the wet land ... yet one of them lies inside the other .. so which is the outer and which is the inner of the wet land ???

Or are they both wetland???? I don't know.
Way: 440320931 lies along side the river

Way: 440690095 incorporates Way: 440320931 inside it and extends to the road..
..

Relation: Georges River Council (6205809) Not closed ... was closed before your change.

And you have now unclosed the relationship area...fix it yourself . Getting tired of these!

Not closed again... I have closed it. But not well matched to the actual boundaries!!!!

This boundary is not visible in the Base map .. you should use the Admin boundaries. Suggest you fix all the associated council boundaries as one changeset ... I would use JOSM.

Opps "Slap Up Road" .. tagged a highway=stream ...corrected to highway=unclassified .. as per LPI base map.

Nodes 3281331663 and 3281331666 are highway=elevator ... and you should not use the name tag to state a function. Corrected.

Frying Pan Road ..is not secondary!!!
At most it would be 'unclassified .. but on the LPI base map is is a track. Retagged as a track -

1) The LPI Imagery cannot be the source of an administration boundary ... I think you mean the LPI Base Map ?
2) The relationship is not closed ... sothern end of Cooks Bridge. And has other problems according to the JOSM validator.