I have a curious situation. I installed a Laticrete "no threshold" shower system with a 5 foot linear drain. The shower enclosure is small. 5 foot long by 36 inches deep. The complete wet wall is on the narrow end completely and the exterior wall of the house runs down one of the long walls with the glass and door to the shower on the other 5 foot side. Hopefully this explains the set up. The whole shower from floor to ceiling has 12" by 24" porcelain tile. I did all the work completely except for the tile. 1 tile up from the floor on the exterior wall side but directly above the drain track the grout weeps a little water. You can put your hand on the tile and it feels a little damp. The whole height of the tile (8 inches) Now any tile above this grout line, below or to the side of it is dry. Kinda weird. Could the caulking on the bottom of the tile where it meets the floor be leaking and the water is leeching up the thinset and coming out of the grout?Now, doing this enclosure myself I am confident it is completely waterproof but curious as to why it's doing it. Any Ideas?