I just wanted to follow up on this. IM contacted me and will be replacing the tank for a second time. This tank is supposed to have the back interior panel made of ABS material instead of acrylic. This should help with the absorption of water leading to warping and ABS bonds better to silicone than acrylic. They also tossed in $200 in TSA gift cards.
We'll see how this third attempt goes. But, it does seem like they are aware/working to correct the bowing issue with this new material. They stated that all new tanks are now being made with ABS instead of acrylic.