Both the due and new columns show up as zero for a few of my decks, but when I click browse on those decks all of my cards are still there. How do I solve this? Thanks 
Nothing to solve there: Anki's not showing me all my cards! - Frequently Asked Questions
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But there’s a set that I haven’t studied and it says 0 in both columns? That’s what I’m confused about 
If the problem hasn’t resolved by now, you should share more information like your deck settings.
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There’s never a “0” in either of the “Due” or “New” columns. There are only positive digits or blanks.
BTW: Did you download these decks?
As @Rumo suggested, if your issue still exists, please provide some more info.
Personally, I would like to see two screenshots:
Screenshot #1: The “Decks” screen (the screen that’s puzzling you).
Screenshot #2: Click on a problem deck and open it in the browser (or to see the “Congratulations !” screen). Sort the “Due” column in chronological sequence. (Click a few times to guarantee the sequence.)
Thanks.
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thank you, it’s now resolved
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