Are you running a stock crossmember mount or did you swap to something like the prothane?
Usually the stock crossmember mount has enough deflection for the studs to protude pretty evenly.
However, the prothanes are so stiff it has a tendancy to not flex & requires some verbal abuse before being able to get them started.
Personally if you have the prothane (or polyurathane equivalent), I would toss it. I ran one for a short while & the vibration through the jeep was so horendous I about stopped driving it until I got a decent rubber replacement.
Previously of Poly Performance, Advance Adapters
Now working on Commercial Helo cert. Email me if you have questions.