I’m experiencing an issue with the number of due cards in Anki. In the browser, Anki shows that I have only 77 due cards (Pic 1), but the actual number is 2011 cards (Pic 2).
Below is a snapshot of my heatmap. As you can see, I haven’t missed very many days. I suspect that the discrepancy may be due to another factor. I’m using the FSRS Helper, which might have affected the scheduling but I can’t remember if I accidently pressed anything.
The reason you see more cards than that on your Decks screen is that your search is too limited – you’re missing overdue cards. Change your search to prop:due<=0 – then to see how many cards that is, switch to “Cards” mode.