No worries. I managed to find some of the buildings and removed them to get back to 1000 items :D

Oh I can finally see all the items.
Thank you very much for doing that and you cannot imagine how did you make me happy that this collection is available once again!

I am trying to do so but first I need to find some of the buildings I have in this collection because to remove them and add them in a second collection. No worries. I already fixed one of the collections that had over 1000 items.

Maybe you should make a second part of this collection to fit all the items. It would be great to have this collection once again, because it was my favorite collection of high residential on the workshop.

myeah,,,that's because Steam has an issue. Normally there should be maximum 1000 items per collection and this one has more and before I was not able to add more once I reach the limit, now it seems I can, but if I do it and go over 1000 items, then it shows nothing in the collection.
Now the problem is to find what I have in this collection and remove some of them to get back to 1000 items.

same as below, no items visible in collection, please fix it

AINT NOTHING HERE