I agree. Get your installer in there. It shouldn't affect the watertight integrity of the pan, being that the tile and grout themselves aren't supposed to be waterproof, but it still shouldn't crack, and especially cracking this soon would make me extremely nervous about longevity of the shower on the whole.

Staceyneil, thanks for the reply. I actually called the tile guy that regrouted my walls. He basically said the same thing as you. That the pan should take care of any water getting through the grout. But since living in the house for a year I have found things that the builder either did wrong or he cut corners. So I was just worried about how he built the shower. So I really have no idea what he used to build the pan with. As for the shower door. Once more thing that I did after blowing up the balloon to test the pan was to put a shower curtain on the inside of the door. This way when I showered no water could hit the shower door. When I did this the toilet paper stopped getting wet. So that is how I knew it was related to the shower door. So I started looking at the shower door. Well sure enough the previous owner has caulked over the weep holes in the shower door. So I thought to myself, where is the water going that gets into the bottom door track?? The threshold that the door sat on was not tile, but one continous piece of corian. There was caulk on each side of the threshole where the corian met the tile wall. So when I took the door off there was a small hole in the caulk right where the bottom track of the door met the vertical track of the door that goes up the tile wall. There was also a small gap between the bottom track and the wall track of the door. So to make a long story short. I think what was happening was water was getting into the bottom track of the door, leaking through the small gap between the bottom track and wall track, through the small hole in the caulk, and then leaking into the drywall.

Not a pro grout job. I had something similar, only worse, and it turned out that the backer board was not properly installed. It wasn't firmly attached to the studs. There was some movement and the tile cracked. The contractor come back and redid the whole wall, on his nickle. YMMV

Really recommend you get an onsite inspection, analysis and discussion with a very qualified tile contractor (not the folks who performed the work). There are several approaches to this. None are effortless, but onsite is a must, and a pro is a must. You already know you have issues. No more advice from the internet will solve them. If you are near any of these certified contractors, that is one place to start. https://www.ceramictilefoundation.org/find-certified-tile-installers Or referrals from trusted sources locally. Where did you buy the tile? If it is a quality tile supplier, they may be able to provide you with the "A list". And yes, re-visit the "curbless" in your situation. At the very least, a small threshold, but this can be discussed along with the other issues with the Pro.