I shoot 2315's as well. But my tips are 125 grain. With the Magnus Stingers, a little trick that I did was use some spare O-rings from NAP Thunderheads and put them on the Stingers so I could just get the Stingers snug and aligned vertical with the bow string.

Read through some of my threads and you'll read about my mistake with the 100gr Stingers versus shooting 125gr field tips, 125 T-heads, 125 Slick Tricks. Your bow sounds like it is a little out of whack with shooting broadheads. Do you shoot 100gr field tips? ...just curious