Anki taking off cards

i am quite new to anki. I’ve bee. Having a problem, when I’m looking at my decks (anking mcat) for the day it will say for example 129 review cards to do. But when I click and start to do my cards it says only 89. I have already checked my limit which is set to 9999 so that shouldn’t be an issue.

That sounds like you have sibling burying activated – Studying - Anki Manual .