Ahh, brings back some not so found memories when I did the oil pan gasket on my 96 4.0 like yours. But bet I could do it in half the time again and tried to follow the procedures in the below link within my thread post.
So you must have run into the "main bearing cap girdle" which was a 1st on the 96 4.0 with the 12 nuts (14mm) torqued to 30-40 ftlbs? I can see why you probably just loosened the rear nuts on this contraption and then torqued the main bearing nuts to the best of your abilities the 2nd time around.
I just used the anerobic gasket maker on the corners and bearing cap but if it makes you feel any better my Mopar gasket stuck out of the front a little too.
There's something wrong with that oil filter adapter o-ring where it meets the block to continue leaking. Believe I'd remove it again and check to make sure it isn't pinched/cut. If not you can use some high-temp ultra copper RTV to help seal it up. It's best to have the metal a little warm which brings oil to the surface and use some rubbing alcohol to clean it off 1st.
Glad you rear seal/pan gasket isn't leaking and good luck!