Weapons rank mix-up

[Googi]

Okay, I go around and hit people with arrows (trying to get my rank up), I check my weapons ranks, and I get this...

sword Rank: 0 (93%)
knife Rank: 1 (48%)

Okay, so where is my bow rank?

Anyways, I hit a few more people with my bow, and notice that everytime I hit someone, my knife rank goes up, and not my bow rank, so I get Karate and use that (I never bothered to use it before), and it is also increasing my knife rank -_-.