hi , any ideas please? I got a bathroom floor tiled 8 months ago. All fine for about 4 months then a few tiles splitting right down the middle . This happened in a few areas. Also some grout coming up from other areas. We have gotten the tiles up with a view to getting it redone. The tiles that cracked in middle were over joists. But all the other tiles just lifted up very easily off the floor leaving all the adhesive on the floor....There doesn't seem to be much movement in floor. There is no adhesive stuck to the tiles we took up...is this an adhesive problem would you say??