Wand now different.
 

Ok. So I just logged in and noticed my hotkey wasn't working for my wand.
Then I notice, somehow I now have a wand that is a: wand of magic bullet (lvl 0) with 39 charges left? That's not what it was before. In fact it was just a regular wand.

Someone brought it to my attention that I may have just identified it. I'm not sure how, because I've been using identify many times before now. So maybe it's not a bug.

You identify wands with the Identify Spell or Thaumaturgy skill. Though I've never been able to ID a wand. They all seem to come identified.

That must be it. I've had Thaumaturgy for a while, but although I've used it before I've maybe never had a high enough level to do it properly. And I clicked it a few days ago for the first time in a while.