Problem Creating a Basic Deck

I’m trying to create a Basic Deck and the results are not what I expect. My test deck with three cards each with a question on the front and its answer on the back. On the front when “Show answer” is pressed, the back of that card with the answer should be shown. On the answer (back) side of that first card when I press “Again” I expect to see then next card followed by its answer cycling through all the cards.

Here’s what I would expect from a Basic Deck:

Card 1 Question  (press "Show Answer")
Card 1 Answer    (press "Again...")

Card 2 Question  (press "Show Answer")
Card 2 Answer    (press "Again...")

Card 3 Answer    (press "Show Answer")
Card 3 Question  (press "Again...")

Card 1 Answer    (press "Show Answer")
Card 1 Question  (press "Again...")

etc...

However, here is what I’m actually seeing:

Card 1 Question  (press "Show Answer")
Card 2 Answer    (press "Again...")

Card 2 Question  (press "Show Answer")
Card 2 Answer    (press "Again...")

Card 2 Answer    (press "Show Answer")
Card 1 Question  (press "Again...")

Card 2 Answer    (press "Show Answer")
Card 2 Question  (press "Again...")

Card 3 Answer      (press "Show Answer")
Card 3 Question	   (press "Again...")

Card 3 Question  (press "Show Answer")
Card 3 Answer    (press "Again...")

Card 1 Question  (press "Show Answer")
Card 2 Answer    (press "Again...")
	 
Card 2 Question   (press Show Answer)
Card 2 Answer     (press "Again...")

Card 2 Answer     (press Show Answer)
Card 1 Question	  (press "Again...")

What am I doing wrong?

If the wrong card’s contents appears when revealing the answer, you may have more luck switching the video driver to ANGLE. Display Issues - Anki Manual

Thanks for the answer. I think the characteristics of the “Basic” style got changed so that instead of one card, two cards are generated for each entry. I don’t know how to edit the Basic style back to one card. Fortunately,

I have another Basic style. “Basic-55950” which produces the default one-card Basic style. Perhaps I made a copy of the original Basic style before it got corrupted into generating two cards.