Well, I'm completely stumped with this. When I enable to stockpile to accept every type of weapon, I get zweihanders in there. If I only enable anything that sounds like a sword, I don't. I just can't figure out how to sort the zweihanders out, because they clearly aren't recognized as "zweihanders" by the stockpile. Finally got something right through trial and error.
So now I have a different question. Or two, really. First, am I correct in assuming I can have as many different runes on stuff as I want, but not 2 of the same? And if I have the same rune, like Orichalcum (that's what Iridium uesd to be, right?) on both my breastplate and helmet, do those stack?