It sounds like part of the coil is touching metal somewhere or you could have some wraps touching. I would say to loosen the screws and adjust the coil seating. Also check that your wraps are evenly spaced and not touching. Next insert your little blue screwdriver
thru the center of the coil and use it to leverage the coil into the correct position.
Now dry fire your coil and see if it is heating evenly. It would help if you had an ohm reader. If none of this helps, maybe a trip to a local B&M and see if someone there can help you get the coil correctly seated. Goodluck