We resently put cermaic tile in our bathrooms.But it appears that the tiles are moving and the grout is cracking. We put the tile over top of the linolium using a thin set mortar. The lino was screwed to the floor and the surface roughed up. Is there a way to fix this problem or do we have to redo the tiling? If the tiling must be redone what better ways are there to afix them to lino?