Here are some of the threads they're talking about
I think there were other threads too, but that was some of them.
So now, it sounds like she has 5 males in separate tanks, and 6 females in a sorority (along with swordtails, baby swordtails, snails and a frog).
Which bettas died? Gator, Kitty and Candice?
And who is Mr. Bunny? You mentioned him, but I don't see him on your list.
Also, Kathyrn said that Prince's water temp is 82 and Mr. Cupcakes's water temp is 80, but they don't have heaters. How do you know their tanks are this temperature? How warm is your house? (Because I know you live in Canada, so it's not a tropical location!)
All in all though, I have to say that it looks like you've improved the living conditions of your fish. So all of them are out of the 0.5 gallon tanks now?