Good point. But Andreessen also put a lot into the series C round. I don't have all the numbers handy to do the math on whether approx. doubling their series C interest cancels the dilution of their series A and B interest. I just kind of assumed that it did. Sorry if I am wrong.
I did find it very surprising that a16z was getting their stake increased here. They were on the board for years. Whatever happened, happened on their watch. Highly unusual.