Threads sticking out are not uncommon.

I usually tighten the left side cup until there is no slop in the spindle moving in/or out. I give the spindle a turn to see if it's binding. If it binds, I back off the left side cup until there is no binding, usually 1/8 to 1/4 turn. Then I put on the lock ring and tighten it down, making sure not to turn the left side cup.