Collectible Card Game Headquarters

For some reason, when you use the "+" and "-" signs after highlighting a card to add it to the deck then check the deck list under the Player tab, it usually does not show up on the deck list (even after saving the deck). But, if you simply double click on the card to add copies of it to the deck, then click "save," it always shows up in the deck list.

And by "+" and "-" I meant "+ Add card" and "+ Add 4 of card."