Bale
Minion
Bale, has the both parent percents been spaded? I've heard a hypothesis different from yours, but I believe yours is most likely correct. Some have said that Greed would be no more likely than Gluttony for both parents in your example. I don't have enough stats to compute that, but KoL usually takes the path of least coding resistance and eliminating dups requires more code.
I'm pretty sure mine is correct, but I cannot be 100% positive. So far I've mostly spaded with my extra materials while mastering crafting. It's just something I've played with for a few days here and there between ascensions.