Odd spending/credit issue

Maybe I overlooked something but - I have a secondary checking account which is just an account I put a little money in each month for shopping. I had a transaction of 4.62 on the checking account, switched to Plan and it showed 4.62 spent on credit - Visa credit cards showed I needed to assign 4.62 to the card as well.

There was no charge for 4.62 on the credit card. Why would it show up on Plan as a credit card charge?

The spending account is a new checking account I recently linked - is it seeing that as credit card spending for some reason?

Edit: I kind of figured it out - I assigned funds from Ready to Assign which fixed it. But this almost seems like YNAB assumed that the spending was done on credit even though there was no transaction done on credit.