What is the expected behavior here? I assume each note has its own unique note ID that never changes. Ankihub just changes the card type into one acceptable for ankihub syncing right? So whatever note is associated with first ankihub deck, even if you add another ankihub deck, the note will still be associated with the first ankihub deck?
There was a discussion about this here: Problem of overlapping note ids between decks
Currently the duplicate notes in the second deck you install will be skipped.