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... It's just a tile thing, you can remove it because it is just some oddly placed part in the tiles. It's just a simple click the tile and redo some bits.
1 - The buildings are fine when the background bit is set to 20.
2 - The animation thing that has randomly appeared everywhere - it is a standard tile, like the trees and such. easy to remove in Advance Map.
wait...
save your map through A-Map, and then play it in-game.
during in-game, go away from the map, either go to another map, or enter a house, and then try going to the tile once again.