Are you guys sure that the shoot through mesh will not affect broadhead flight? I shot at a buck on Friday, and a doe yesterday through the mesh of my Doghouse blind. Both times the arrow was short. Although it may have been a bad guess of yardage, I hope that it wasn't because of the mesh itself.
The only way you can know for sure that YOUR choice of broadheads will fly unaffected when shot through YOUR choice of blind is to practice with YOUR set up. Sounds like you failed to do so.