So, TR and BoM both say "choose a card." And we agree that the card BoM chose is played twice. Does Throne attempt to play BoM again, but fails because BoM chose to be another card? This would allow TR-BoM(Feast) to work and matched the "BoM only played the first time.
No, Throne plays the card again, noting that somehow this time it's no longer BoM.
Okay, so basically what I said there:
Throne "Choose a Card"
- Choose Band of Misfits
- Band of Misfits "Choose a Card" + Get Tokens(BoM) function
- Choose CardX (no longer BoM)
- Play CardX + Get Tokens(CardX) functions
- Play CardX + Get Tokens(CardX) functions
This is the only way BoM will give only 1 token.
Throne: Choose an Action card in your hand. Play it twice.
Band: Play this as if it were an Action card in the Supply costing less than it that you choose. This is that card until it leaves play.
So both cards are based on "Choose an Action card" but you can only choose BoM on the first play.
I think the confusion came from the contradiction between "Play this as..." and "This is that card..." where one of those suggests that BoM is played each time, and the other suggests that BoM is not played at all.