>>537519214
>What would be the point of buying multiples of a Deck?
To get extra copies of certain cards, most of the time you'll want to run a card at two or three
>How do I recopy one of the structure decks to my ingame decks?
Go to an empty deck or one you don't mind overwriting and click "copy deck" you'll be given two options click the one the lets you copy a deck to the current one you're on. From there they're should be selectable tabs that say "Gx" "5ds" etc click the one that says structure decks and they'll be filtered out for you to pick from there.