Still post a pic when you get a chance, cutting or shortening the adapter may not make the bhead flush with the end of said adapter.
Some of my broadheads are flush and some of them are not. Either way has
never been an issue. If it were me I would not worry about it one bit.
I shot this heavily shielded bore with an ace super express(non flush) and
aluminum forty two grain adapter. Through the shield and into the off leg
bone. I unscrewed the arrow and had to use pliers to pull the Ace out. 585
grain arrow out of a 70# MOAB.
https://www.tradgang.com/videos/tg/hog1.mp4