Ben - thanks for the reply. I tried to simplify our build somewhat for the initial post. But doing so may give inaccurate conclusions. I'm concerned about the builder's skills, but I'll reserve judgment until I furnish you all the details.

Our project is relatively complex. Some details:
36' x 18'
Depth from 3' to 4'6
Tanning ledge
3 18" sheer descents
1 36" sheer descents
Raised spa

Tonight, I went to the construction site and extensively diagramed both the pool and spa hydraulics. I also have a sketch of the pool. I would like to attach them to my post; however, I do not have such privileges yet.

After I'm able to post the diagrams, I can furnish an extensive list of all my questions.

Thanks for the help.