I had this problem last year as well. I found that my generic gold colored snap swivels were not letting the leader spin as needed and it would twist up.
I switched to ball bearing swivels on the snubber end and no problems after that.
THey last a lot longer too... I have the same Cabelas brand ball bearing swivels on my trolling rods ever since. Well except for the one wrapped around my outdrive with my 30# braid... But that is another story. Now I dont even use a cheap swivel when fishing for Bluegill.