Right, and now compare it to the original bag.
You have increased variability between generations by reducing the variability in the second generation.
You have increased variability between generations by reducing the variability in the second generation.
I agree with you that the variability has been reduced in the second generation.
It seems that we both disagree with the original paper, then, as it states
"If sex A is relatively selective and will mate only with the top most desirable quarter of sex B, then all of the next generation will be offspring of the more variable subpopulation B1"