Cards Not in Decks but in Browser

In my deck, it says that I have 0 new, learning, or due cards. But the cards appear in my browser. It has the set due date to 0, maximum daily limits, and the deck is set to default. I know this cannot be correct because this happened while I was making flashcards for this deck which I have not even reviewed yet. Is there anyone I can restore the cards from the deck that appear in the browser back to my actual deck?

Maybe the cards are suspended? If you’re still having trouble, which deck are you having trouble with?