Current List of Bugs:
* Squads can only be made after a knight is assigned to the 4th or the 5th knight position. If you are still confused how to start your human army, keep assigning knights until you can make squads.
* Helmets are sometimes made out of cloth. This seems to be unfixable. But in the next update, they will only be sometimes made out of leather, which is the closest thing to a fix possible.