One of my followers(Faendal) has been having trouble figureing out how to work his bow. He stands back like he should as an archer, but instead of shooting, he holds his bow in his left hand, and throws punches with his right. He has plenty of arrows on him, he just won't use them.
I use AFT, and until recently didn't have this problem. It only seemed to start after I added SkyRe. I can monkey rig him sometimes by taking away and returning his bow and arrows, but every time I reload, he's back to cheerleader mode.
Also, when he does use arrows, I can no longer pick up the ones he missed with. The tool tip shows when I put the cursor over them, and I can 'grab' and move them, I just can't add them to my inventory.
I'm going to go grab my other usual archer followert(Anekke) and see if she remembers how to shoot. This will take a while because I have to 'unlock' her first.