Funnily enough I have literally just got in from taking my dual air u turn revs to bits for a full service.
First of all yes the gold/silver knob in the middle of the compression adjust blue lever on the right hand side (as you sit on bike), has 15 turns (well mine has 14 just counted). This is the floodgate threshold.
This is a great article for explaining how the compression adjust works.
http://www.bikerumor.com/2010/08/20/tech-article-how-rockshox-motion-control-works/
I have 8 clicks of compression adjust on the blue knob. There is hardly any difference between the first 6 clicks. Seventh you start to feel forks stiffen up and 8 is lockout. Does not completely lock the fork out, few mm of movement and I adjust the floodgate to open on big hits.
As yours lockout OK, most probably oil levels are fine. Worth a check though and an oil change incase the wrong weight of oil was used.
Rebound damping is as you say controlled with the knob on bottom of fork. Turn to the turtle to slow rebound rate down and to the rabbit to speed it up. I like my forks pretty active so have this a couple of clicks from the rabbit.
Does depend on how you have set the dual air Chambers. Remember let all the air out of neg first (bottom), let air out of positive. Cycle the forks to ensure you get full travel (confirms no oil has leaked into the leg or damper side overfull).
Then pump up positive, then same pressure negative. Turn rebound adjust to full closed (turtle) and you should hear the swish of oil travelling though damper on rebound. Turn to rabbit and they should behave like pogo sticks!
Loco tuning has a good setup guide on his website. Check that out.