I'm putting this is costume issues since it's power customization related through the costume editor UI...
I saved a power customization for my DP/Temporal Blaster. Instead of Dual Pistols, it shows up as Martial Combat in the Load Power Customization screen. I logged out completely to desktop and restarted the game, and tried a second save, and it's the same for both.
May not be a big deal since you can't actually customize the powerset of Dual Pistols, only the pistol model, but I found it very odd.