Ah, thank you, I misunderstood the language but it's clear to me now. If you add a single game to multiple jams it will be removed here (so it isn't games added to multiple jams hosted by these organizers, as I originally thought).
Since this timeline conflicts with the Climate Change Jam I'll probably have to sit this out then, which is a shame because the themes would have been perfectly compatible with that one. Oh well, I'll catch you guys in the next one.