Weapon Master archetype fighter can't select Advanced Weapon Training feat
The Advanced Weapon Training feat from Weapon Master's Handbook specifically states that the Weapon Master fighter archetype qualifies for this feat, even one level earlier than other fighters. However, since the prerequisite for taking this feat is 1 Fighter - Weapon Training special ability, the Weapon Master archetype can't take it since he has a Chosen Weapon instead.
This book is largely unimplemented. I will try to fix it up over the next week or two.