if there is a building=construction (that has completed) please re-tag it to some other building=* value and do any alignment fixes necessary instead of deleting it and re-adding the building on top. Preserving history of way's is important. Also please check that the buildings you bringing are aligned with the imagery before uploading. As a note the Bing aerial imagery is the best we have in the Southern half of Miami Dade County.

Happy mapping,
Udar.