Need some clarification here...

2 days ago I started Friel's anatomical adaption plan. I take his wording to mean to do 2-5 sets of each exercise listed (8 of them) for each workout, and do 2-3 of these workouts a week. However it also says Sets/Session: 2-5. And I guess this could mean only do 2-5 TOTAL sets for each SESSION and not for each exercise. So what the heck does he mean here?

The reason I ask is because I did 3 sets of each exercise on Wednesday and now I'm experiencing some extreme DOMS. To the point where it's hard to walk up stairs. Couldn't ride my bike today either. I have a few years of heavy weight training under my belt, so I know soreness, but this seems like too much for an AA phase. I'm dying here, and you're supposed to do this 2-3 times a week. Somebody please tell me I'm wrong.