I bought 2 packs of the Magnus Stinger 2 blade broadheads. I put them on my arrows and they wobbled. I put some field points on and they didn't wobble. It seems kinda weird that 12 arrows, 12 inserts, and 6 broadheads won't spin true. I am using the Gold Tip XT arrows. Have any of you guys had problems spinning the Magnus Stingers? What should I do?