So on the Cutthroat bundle page it says "up to level 50 gear available". Was that previous to the MB/AQ update? And does the Cutthroat companion level up when you do? (I've never had a bundle so I don't know :p)
Yes, that would be old information that needs to be updated! I'll forward this along. It should read "up to level 60 gear available."
The Cutthroat companion follows the same leveling rules found on this page of the player's guide: https://www.pirate101.com/free_game/players_guide/companions/training. Furthermore, redeeming a bundle companion acts similarly to gaining a new companion through questing: your new companion will automatically level to approximately your level upon redemption.