Thank you for your feedback, Trip Maker :)  After examining the tags, I believe that the min:level tag is causing the buildings to appear as if they are floating. The intersecting/overlapping building that I had previously removed had the building:levels=9 tag, which I assume would fill in the gap where the building with building:min_level=9 is currently floating.
Am I understanding this correctly? If so, I can revert back the changeset to resolve the issue.

Regards,
Jesspher