I am on playthrough 2.5 of Borderlands GOTY Enhanced.
I have beat The Destroyer on the main mission and leveled up to level 69 before finishing the ClapTrap DLC.
After I finished the DLC and got the extra skill point. I reset my game back to playthrough 1 to do it again and get that skill point real quick as well.
After that, I went back to playthrough 2 and went to do the Fort Knoxx DLC but the whole DLC is capped at level 55. I have tried restart the game and the whole PC.
I have went to Old Haven, they are all scaled to level 69.
I have went to the ClapTrap DLC, the enemies and gift shop, they are all scaled to level 69.
When I go to T-Bone Junction, the vending machines and enemies are all level 50-55 and any mission I do is marked as Trivial in difficulty.
The only thing I can think to do at this point is to clear out the sidequest long in my first playthrough and see if that effects anything but I honestly don’t know.