RE: Reason for nocking point to be high and not square?
Typically, I've found that my BowTechs shoot best when the arrow is perfectly level and perpendicular to the string, but that is on binaries and not true dual cams; I didn't shoot BT when they had the duallys.
Just about every single cam I've ever seen favored a 1/8" high nocking point though, or somewhere around there. Individual shooting characteristics and mannerisms could account for a different nocking point.