I'm playing with 2 MU's (1 red and 1 white). They stopped leveling up at 10. All other characters are progressing up to 13, 14 and 17 for thief. I thought MU's could get up to 14th level by reading the charts in the manual. Has anybody else seen this happen?

I guess your mages are elves, elves of the wrong kind.

Alternatively, you could just use a hex editor to change the character's race to, say, humans.

Sorry I should have mentioned that. my MU's are human. I didn't like the level cap so I converted my whole party to human when I transferred from COK into DKK. Not elves human, what is Gold Box Companion?

Sorry, my bad. I thought I converted all of my characters to human. They are indeed half-elves. mystery solved. I can google gold box companion and see about converting them to human.

Thanks everybody for the quick and eye opening responses!