FYI
I recently had a hole form in the bottom of my bowl. I removed it and patched it with JB weld. Now two weeks ago I removed it again to install the electric fuel system and low and behold there was another small drip trying to form. It was leaking again and in another spot.

If you do repair your bowl and reuse it, after removingthe heater, I would highly recommend Putting a full layer of JB weld over the entire bottom of the bowl. I personally thought about doing it on the inside. The heater and drain are far enough from the bottom as to not interfere. This would be more of a permanent fix.

My bet is the bowl is leaking from the bottom and that is where your other leak is.