I have recently completed exploring a 3x3 block of map tiles as well as a 10th tile. All of these tiles line up perfectly when mounted in frames on the wall. However, on trying to explore an 11th tile, no matter where around my previous tiles I try, the tiles are always overlapping the previously explored tiles by about half a tile making it impossible to line them up on the wall. I wasn't sure if this was a bug or not to be honest, but on asking around some forums and groups it would appear that it might be so any help will be gratefully received.