but the further i move up level wise the less perks i get to pick,
2nd edit:
Doh, missed that part about 3 levels. If that was indeed the case, then nvm, it must be mod/glitch etc.Well, Perks do have stat, skill and clvl requirements. If you don't fullfill many of these at the time you level up, the list to choose from doesn't grow that rapidly. It's (remotely) possible that your chosen stats + clvl are blocking access to a lot of perks etc. I say remotely because I think it'd be pretty hard to unintentionally make a chr. with stats that would block so many off that it would seem like nothing new ever showed up. Other than that, not sure...could be a mod, if you're on pc/using them, yes.
EDIT: there isn't a specific SPECIAL...next time you level up and can see the Perk list, go through all of them and see what the requirements are. Some have SPECIAL requirements, some skill requirements, it varies. For SPECIAL, 6 is a common magic number for a lot of them.