hihi. that is incorrect.
Super pastel x spider does NOT give killerbees.
killerbee is made from bumble x pastel or bumble x anything with pastel.
Both parents need to have the pastel gene in order to make the super.
You'd have to re-read your genetics on Co-Dominance on that one.
Anything bred to a super pastel would produce AT LEAST pastels, but no supers.
greets,
Yaron