This may sound stupid, but here it goes:
Are there level caps based on the expansions you have or is 65 a universal cap and it doesn't matter which expansions you have any will let you get to 65? If that confused you, here is an example: If I have shadows of Luclin and the previous 2 expansions, will the game allow my character to get to level 65 or is there a cap before that because I only own up to Luclin? Would I need a certain expansion to allow my cap to be 65?