How do you mean Kamal_? I don't understand.
PJ
Tiles placement options:
1) rotate the tile before you click to put it down, so when you put it down it's already in the desired orientation
2) Immediately put the tile into place, then rotate into the desired orientation.
Theoretically they should both produce the same results, but iirc there was a bug with some tiles where they did not and the tile needed to be rotated to the correct orientation before placement. That's was not a visible problem when the floor is flat, but if a floor can't be rotated and you try to rotate it, it doesn't actually rotate the floor (but does rotate the walls and floor) which is a problem when the floor is not flat. There's a known cause (the floor parts of the tile not being marked correctly in the model), and an unknown cause. I trust that rjshae has marked the floors correctly.