Not sure how to explain this one in words, so I'm using pictures: (no buying/selling/upgrading of cards was done in between)
This is my collection of "other" cards. In particular, notice that there are *23* Quantum Towers.
This is still my collection of "other" cards, but now instead of being on the deckbuilder menu for normal games, I am in the deckbuilder for the Arena:
Notice that there are *19* Quantum Towers in the collection and *5* in the deck. Where did the 24th Quantum Tower come from? I have no idea.
If I take out the 5 towers from the deck one by one, I get this:
24 Towers on the arena deckbuilder, but 23 on the other deckbuilder.
If I click on 'remove all', I'm back to 23 towers again:
So the correct # of towers I own is 23. (probably) At this point you get the idea. Anyway, in the arena deck, I can put all 24 in the deck. I'm not sure what would happen if I submitted it like that; I don't really want to test that :p I tried scrapping and rebuilding the deck, presumably in a different order, and when I did that, and put the towers in somewhere in the middle, the count dropped by one once I added the first one. However, when I resubmitted and went back to that screen, the 24th tower had magically reappared again.
I have no idea what's going on... ???