Anki Learning Cards Counting Incorrectly

Yesterday, I studied around 600 cards. However, today the cards are not progressing forward but are counting backward to 0. How do I fix this?

Update: I switched my settings to study 200 cards at a time. The cards go from blue → to red but then don’t go to green.

^ I had 200 cards and I studied all 200 which then went to the red color. However, I’ve reviewed 15 cards and they aren’t going to the green color. Is this supposed to happen? Thanks!