So... Borla S Type went in today

My buddy had some issues installing it, the right middle pipe seemed messed from when it was manufactured almost as if it was bent wrong- left one went in perfect and lined up perfectly. The right one ( when aligned to match the left ) was pressing against the bottom of the car when the left one had about 1.5 - 2 inches of space. He was able to get it to sit but it’s not on a hanger as the hanging arm ( or whatever it’s called ) attaches to the middle pipe does not match up. Idk... calling Borla tomorrow. Maybe the piece was welded or bent wrong when manufactured?? Anyone have this issue?
For now, the right muffler sits a little skew but it’s all he could do.
It’s sounds amazing BTW... sick tone to it. I noticed my gas mileage the dash gives me has gone up quite a bit.. was at 11.2L per 100km and now it reads 16.6 - is this normal?