for my first ever tile project, i tiled a kitchen countertop with ceramic 12" tile, sanded grout. then, out of broken ceramic tile, i covered the backsplash that runs up to a 10 ft ceiling with a freehand mosaic, again with sanded grout. it looks amazing, but i'm concerned that the sealer may not have been adequate. i'm not so concerned about the backsplash, but on most of the countertop grout, liquid continues to soak in rather than bead. i used the the most expensive sealer that home depot has to offer, and did several applications. is this normal, or is there something more i can do to protect my investment? thx for any insight you can provide!