I had a closer look to these edits. They created tens of thousands of warnings and errors in JOSM. There are duplicates of existing buildings, untagged ways, rectangles that are much too large to resemble buildings and so on. 
I reverted these uploads for now.

Please make sure that you only upload objects that are not yet present in OSM, that they have appropriate tags and honor all the warnings and errors JOSM displays before uploading. Please don't bulk upload huge amounts of data, but cut these edits down to sensible amounts of objects.