If you never had the problem before, the reasonable question to ask is what changed with your setup before this problem started cropping up? Have you changed to Wasps from another head? Anything that's different now from what you had before you started having trouble needs to be looked at.

You say you're shooting 55/70's at 68 lbs. To me, that kind of waves a little red flag about checking arrow spine.

And it just might be that lightning really has struck twice and you really don't have a problem. Stuff happens, ya know.