Yeah I had originally listed it in the same order as the code, but Iori looked really sad by himself in the gray category not next to the rest of the IDOLiSH7 boys, hence the switch up!

Yep! You can use older cards for the green task that are not earned this month as long as it's one card per series - it'll be stated in the task itself whether cards used need to be from the current month or not!