The pic is not my tank. Just for reference.
Figured out the problem. When my uncle expanded this tank, I guess he cut through the vent tube. I was able to find the top of it after pulling the fuel pump. It is now on the left side so when it sits on the kick stand and is almost full, the fuel can be forced out of the tube. I cut the tube shorter and reran it back to the top front of the right side so It won't do it again. Filled it all the way up, ran it, and parked it. All better now.