You're both correct as far as I see it. I believe the traditional interpretation of a rolling spawn is when waves (or classes) of bluegills spawn at different times throughout the summer. However, that doesn't necessarily preclude the SAME female BG from participating in the rolling spawn, and spawning more than once a summer.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.