I'm sorry if you think I was suggesting there was anything wrong with holding your legs the way you are doing it. There isn't.
I share your challenges with being very short and slight and carrying doubles. Unlike the tall men, who have HUGE lever arms of legs out behind them, you and I are basically a set of tanks with feet and a head sticking out of them. There isn't a lot of room to use body position for trim. If extending your knees a little bit fixes the issue, that's splendid.
I tried yesterday to find a couple of recent photos I had seen, of T2 divers hovering with their legs in precisely the position you are describing, but I couldn't find them. There is NO prescription for a 90 degree bend in the knees. And there is nothing wrong with doing what works, if it doesn't cause an issue elsewhere. Despite what many people think, GUE diving is not that prescriptive and is really pretty pragmatic.
Lynne, it wasn't you