In the tinker guild, and I think other guilds, some weapon skills are not level 1. I can't think of a good reason why that is, and I can think of several bad ones.

Not having the skill at level 1 just means you have to waste X ammount of devs to be able to get to, say, level 5 and be able to train 2-handed polearm, or rely on a LOT of constant spellups, or have the first 5 levels take aeons. The advantage of chosing 2-handed polearm as your primary skill after all those hassles is... Well, none really.

I might miss something, but I can't think of any good reason of having any weapon skill not be level 1.