For that matter, if you King's Court BoM, playing it as Mining Village, Guide, and Mining Village (choosing to trash Mining Village each time), do you get $4 (I'm guessing the second trashing counts because it's on your Tavern mat rather than in the trash, in contrast to Throning Mining Village where it's already in the trash on the second play)?
I don't think there's an official ruling on this case, but I think that BoM will have lost track of itself, so playing it as a Reserve would fail to move it from the trash onto your Reserve mat. This is so weird though.
Well, let's look at the lose-track rule again:
"In rare circumstances an effect may try to move a card that is not where that effect expects the card to be. In those cases the card does not move—the effect has "lost track" of the card. Losing track of a card prevents it from being moved, but does not stop anything else from happening.... Cards do not lose track of cards that they move, only cards that other cards move.... Things lose track of a card if something moves it, if it is the top card of a deck and gets covered up, or if it is the top card of a discard pile and gets covered up."
So, there are two possible questions here:
1. Has the card been "moved" at all? The second time your KC plays Band of Misfits, it's in the trash and tries to play itself as Guide and move itself to the Tavern mat. For it to fail to make it to the Tavern mat, something else has to have moved it. But the card is in the trash continuously from when you start playing it to when you try to move it to the Tavern mat—in fact, it's been in the trash for longer than it would have been in play if you just played it from hand. However, the card was moved to the trash at an earlier time,
before you tried to play it as Guide. Does this count as having been moved, for the purposes of the lose-track rule? It is true that the card "is not where that effect expects the card to be", but Donald X. has told us that it's the last sentence, not the first sentence, that defines when the lose-track rule applies.
2. If the card
is considered to have moved, what moved it? Cards don't lose track of things that they themselves move. So here we have a Band of Misfits in the trash that was moved there by a Mining Village… but they're both the same actual card. So do we consider the card to have moved itself (and so the lose-track rule doesn't apply)? Or do we consider it to have been moved by something else, because what moved it was a Mining Village and it's not that anymore?