Quickbooks has stated coding my credit card statement transactions to my chequing account. How do I fix this?

Hi CTT2, 

Welcome back to the Community. QuickBooks is designed to help you simplify the way you categorize your transactions. I'd like to help make sure you experience this benefit without running into issues. 

Based on the details you've provided above, I recommend checking to see if you have banking rules enabled on your account. Banking rules is a feature that automatically categorizes your transactions for you. Here's a helpful article that provides on how to manage and : Set up bank rules to categorize online banking transactions in QuickBooks Online. 

Let me know if this info helps by leaving a comment below. I'll be a message away in case you need further assistance.