There is 'no' gap between the fixtures, I'm not going to worry about the leaks around it because they only happened with me testing it for leaks, by pouring water against that wall around the fixtures...so you are saying that it shouldn't matter that they leak because the shower nozzles spray away from that wall anyway. So let's concentrate on the real problem which is that the seal (caulked rim) around the entire tub leaks when we shower. I have yearly completely removed the caulk around the tub and recaulked only to find out that the caulk only lasts a short time before it leaks again and was wondering if I could remove the caulk entirely, push something back into the gap like hydraulic cement to create an permanent seal to the gap, then caulk over the gap? Just caulking alone has proven not to be enough to keep water from pushing it's way through when showering. Please give me one more try here guys besides just re-caulking. Thanks!