My Cutlass Needs Training??!!

[Amasette]

OK, I was messing around with the buttons on the side to see what I could do...and when I got to the weapons one, I somehow (kind of accidentally) equipped F1, F2, and F3 all with my pistol. Now my Rusty Cutlass is in red and says it requires training, and it won't equip in any of the slots! (I've been using that fairly competently for a while now...). So now I'm stuck with my stinky little pistol! I went to that training place with the dummies to see if I could get it working there, but no...still couldn't use it. Is this a (frustrating) bug, or am I just being dumb....? Any help? (Yes, I'm reporting it in case it is a bug.) Thanks!