hey, sorry I haven’t explained this clearly! I’m going to try and record a tutorial video later but for now here’s the best explanation I can give:
User values are applied to any roll expressions made (that is rolls made by typing out dice notation), they have nothing to do with dice bags. so you will need to make separate sets for your barbarian and your bard, making sure to disable the ones you are not using.
roll expressions can be saved into dice bags however; when picking which dice to roll, they look in the current dice bag first. so with barbarian user values enabled and the barbarian dice bag open, entering a roll expression d20+str should use your barbarian’s d20 and their “str” value.
I hope that helps, let me know if you still have any issues :)
Update: I recorded that tutorial :)