Thanks Landgolier...Thats what I suspected. They're slapping the single speed label on a double product to fill a niche market(incorrectly) without having to create any additional tooling and subsequent cost.

I think I'll try to make these cranks work in the meantime, hopefully thecrank bolts will suck them in enough for a decent chainline untill I eventually happen upon(get a winter deal) a single speed specific crank.

Thanks again for all your help