Do bots(AI) not count towards Kill Machine in MP ?

I have had my share of 5 Kills in one life,even 6 kills in a tunnel,but a few of them were AI and i never got my tag,could it be so that Bots(AI) not count towards the Tag,reason i ask is that it's an increase in AI on the servers now,and it's not like i can run around and check everyones name before i kill them with Melee.