My guess is when the results get built, one says pastel, spider and the other says spider, pastel and thus treats them differently. I know mine calc did the same thing, but it was an easy fix:
Male: Female: Percent Fraction Traits 12.5% 1/8 Killerbee 12.5% 1/8 Super Pastel 25% 1/4 Bumblebee 25% 1/4 Pastel 12.5% 1/8 Spider 12.5% 1/8 Normal