The second main thing is an 8 point game isn't a 1 possession game. It's a potential 1 possession game. There is a huge difference between the two. Before we tried the 2 pt conversion, the only thing we know is we need 1 more possession half the time, and we need 2 more possessions half the time. It's best to find out whether we need 1 or 2 possessions as soon as possible. If you make the 2 pt conversion (regardless of when you try it) you needed 1 more possession. If you miss the 2 pt conversion (regardless of when you try it) you needed 2 more possessions.