Hello! We just put down slate tile in our entryway. Carefully made the sure the temp in the room was above the minimum for the adhesive. Did the job right - over hardibacker, used the right tools, all tiles with an even layer of adhesive under them, the floor was nice and smooth, etc. We left it to cure for 72 hours ... and found that tiles are now loose. At first it was 5, but we have since found more. The only operator-error we can think of is that perhaps the temp in the room dipped too low at night during those 72 hours of curing. So. Do we proceed to remove and reset just the loose tiles, then grout etc .... Or do we have to assume that ALL of the adhesive is compromise and redo the whole job?? I know what I want the answer to be, but also don't want to be finding more loose times as time goes on and have a never-ending project. Thank you!!