Lost Kauz, I've seen so much from you that makes no sense whatsoever, and this is one of those things.
1) The level cap is apparently 81, and I can guarantee you that it's more than 77, since that's where I'm at and I still have enough levels to increase for it to naturally land on 81.
2) You get Perks and a choice between Health/Stamina/Magicka all the way up to at least level 77, presumably up to the cap which I believe is 81.
No offense but please stop just taking guesses at everything you can, it's not helpful. Bonezz said 81 earlier and while I can't personally prove it it does make sense.