Update. I replaced the gasket between the tank and base and it seemed to slow the tank drain but the tank still drains in about 45min to an hour.
I've also noticed that the water running out seems to be louder. I can hear it really well as it runs out and through the drain pipe. The commodes in the other bathrooms are not like this. Also, after the tank fills and the ball is "bottomed out" at it's highest point, I can still hear water running through the valve. This stops when I turn the water off.
Should I just pull the commode again and start all over with new wax ring and all new internals? There is no leak around the floor and I can't smell any fumes at the base and the ceiling below is dry. I can't figure out why the water running out is so much louder now though.