You correctly identified all, but perhaps one building, just in older imagery. Generally the buildings you added are oversized, though you appear to have circularized them. This oversizing seems to have led to overlapping building footprints which I flagged. The footprints share a node, and it appears that your cursor likely snapped to it while mapping an adjacent building press 'h' or '?' in iD editor to reference the shortcuts and keybinds one will prevent your cursor from snapping to nodes.
            ---
            #REVIEWED_BAD #OSMCHA
            Published using OSMCha: https://osmcha.org/changesets/152850833
            