SO i recently started using Anki for my DAT prep, i downloaded one of the DAT Biology Anki decks, which only introduce 20 cards at a time. I made an option introduce 20 new cards, however,everyday that I do them, I get the new cards, but I'm never able to review the cards I did before. I also made a Destroyer Bio Anki, and it will only let me review my latest cards and never the cards I made before. Wth!! How do I fix this?