I am said weight weenie road guy. On my SS, I ordered through spinlite cycling. I speced the rear wheel with:
Non-Drive - 1 cross, 14/17/14 Sapim Lasers, Alloy Sapim nipples
Drive-Side - 3 cross, 14/15/14 Sapim Race, Brass nipples

You know what I got? Exactly what I ordered.

I would be pissed like the OP. If I got say Sapim laser spokes over DT Champions then yeah I would have not cared... as its an actual upgrade. Extra spokes, when not needed are not an upgrade contrary to what the tool at BicycleWheels is saying.

EIther way, I won't buy from them. Consider this another potential customer lost (and I have looked at their products and I have spent about $6k this year on bike crap, mostly on the net).