Leveling up stops at 57?

I know i know I probably sound like a noob BUT ive seen people guns say level 60 required but ive beat the game a number of times and my leveling stop at 57 am I missing something here ?!?!?

I would suspect an update either didn’t get installed, or didn’t install properly. You should be on version 1.0.0.17 on XB1.