Hi, Michael,
Actually it is the same building. I create too many objects that can not be uploaded. So I deleted about 2000 objects, to be able to upload it again. At that time I was difficult to distinguish between the new building I created with the existing buildings, so some of them also erased. Here's what I do: block> copy> delete> upload> unlock> lock > paste> upload> unlock.
Best regards
Rizki