I thought there were no degrees of sin in your world, James??
And it seems you are afraid to address the issue that, once Eve partook of the fruit and before Adam did, he had to make a choice to either obey one commandment (multply and replenish) or the other (don't eat the fruit). He could no longer do both. So essentially, according to James, Adam was FORCED to choose one of the commandments to follow because of Eve's choice. But yet Adam was worse since he CHOSE his path. And yet, either path that Adam chose would've been violating one of the commandments.
Adam had no way out.