So I've been using a spear called the Watcher's Guide for a little while. I was getting kind of tired of it and wanted to go back to dual wielding. So I equipped a war pick that I got and tried to equip an off-hand. Well when I was hovering over my off-hand, it showed like the spear was still equipped. I found out im unable to equip another weapon in my off-hand with the war pick equipped. I can equip a torch or a shield though. And that finally caused the spear not to show up.

Is there a list of one-handed weapons that won't allow an off- hand to be equipped or is this a bug?