Lol, I got your answer....
A little back-ground first.
I bought a nx with and auto tranny in it too. I also did the conversion to 5 speed. I ALSO broke bolt after bolt and noticed that the bolts pulled the entire engine assembly forward with every crank (putting hug amounts of pressue on the bolts.)
After braking about 3 sets of bolts and destroying new axles a few times, I decided that the boly holes for the mount on the auto frame are too fare forward byt about 1.5 to 2 inches.
MY SOLUTION
I fabricated 2 steal plates about 3/4 inch thick each and put them together. I made them the correct shape and drilled holes in them to shim the tranny mount. I had to buy longer bolts to make it the extra length. Since then, no issues have been noticed and everything is working great.
If you need me to, I can post pics.
Good luck
Sean