Not sure where to put this so..... When my granite countertops were installed (3 cm) there were left over pieces of backsplash- about 4" by 24" long. I stepped on one and it broke (on uneven soil) and dropped another piece from chest height (again on uneven soil) and it also broke. Does this sound common? I have not had any problems with countertops but worry about dropping anything such as a skillet on them, comments?