Settle down a little bit. You don't seem to know what vandalism is. I did not destroy anything or added features that do not exist or anything like that. Please check out https://wiki.openstreetmap.org/wiki/Vandalism to find out what vandalism is.

Of course that is the same building. Check out https://wiki.openstreetmap.org/wiki/Simple_3D_Buildings to find out how building:levels is used.
Also, of course it needs layer=1 because part of that building is overlapping the service way as did the smaller buildings before. Check out https://wiki.openstreetmap.org/wiki/Key:layer to find out how the layer tag is used. 

Please check out e.g. Warsaw or Gdansk airport to see that what I mapped is quite common.

Please do not randomly accuse people of vandalism.

Please restore my edits.