^^^Jason remembering being glamored then would be a hint, not a continuity error? It is obvious that Bill is interested in fairies for vampire research, so they could be setting up Jason as suitable for breeding with #1, 2, 3 & 4?
(They could also really invest in the True Blood image and have Bill inbreed Sookie and Jason to fix fairy traits.)
But overall, I'd rather prefer that we keep more human characters on the show. It's now very logical that Jason not be different in some way, but that's the way it's been for years now. If they want to do something, bring back Hoyt. They could have Hoyt now open to a menage a trois with Jessica or something.