Almost certainly the case, although I'm trying to get it confirmed right now (in case there's a specific issue with the Longsword). I've only managed to get a Shortsword upgraded to Undying Age, and when Galmmerd via a mirror, can be put in main or off hand.Was created from sentient weapon?
I've done that too in the past, it takes a direct copy of that weapon, so if a sentient was in it, then it applies it as a main hand only cosmetic. Kinda silly but yeaYeah, it was sentient. I guess I've never tried to glamer a sentient one-hander then and this is a more general problem, fair enough.