There’s nothing we can fix on our site. The missing buildings are caused by another scenery in conflict, in most cases it was a freeware that some users removed, and fixed the problem.
The scenery obviously come with proper Exclusion areas ( otherwise it couldn’t exclude the default KEYW ) and with FSX or P3D, we would simply told users to be sure the scenery is “on the top” of the Scenery Library, because Exclusion areas are supposed to exclude sceneries below your own.
However, since MSFS doesn’t allow to rearrange areas like the Scenery Library in FSX, there’s not much user can do, other than check what they are installing.
We don’t know if a “Scenery Library” page, with the ability to rearrange areas will eventually be added in an upgrade, but might might be very useful, so I suggest everybody with these issues to fill a bug/suggestion on Zendesk, perhaps it will be considered as a possible addition because, the more sceneries come out, the more it might be required.