Quest DeckEditor expoits

Is it fine (that is as designed) that in quest mode player can do the following?
1. Import deck - and thus add any cards to his deck. (importDeck() method just adds them)
2. Add any amount or cards into his deck while he owns only one (WTR: start new quest, go to deck editor, add all the mythics into your deck, click on filters, add them again)
1. Import deck - and thus add any cards to his deck. (importDeck() method just adds them)
2. Add any amount or cards into his deck while he owns only one (WTR: start new quest, go to deck editor, add all the mythics into your deck, click on filters, add them again)