Somehowe, my entire past month has every transaction duplicated from my cc feed. It's only been added once. every single transaction is duplicated for a period of 28 days

Thank you for posting here in the Community, @Brigid233.

Let me share some insights about duplicates of bank transactions in your QuickBooks Online account.

First, I would like to know the name of the bank you are using so I can check for reports about that bank.

If you download the transactions from the Banking page, they will appear in the Categorized tab once added to the register. You can undo transactions to get rid of duplicates.

Here's how:

1. In the left menu, click Transactions or Banking.
2. Go to the Banking page, and select the Categorized tab.
3. Select the checkboxes of the transactions that are showing duplicates.
4. Hit the Undo button.

Once done, the transaction will go back to the For Review tab. And to avoid confusion when reviewing your data in the future, you can exclude what we have undone. 

1. Select the checkboxes of the duplicate transactions.
2. Hit Exclude.

To avoid future duplicates, I recommend double-checking the transactions before entering them into your register by categorizing and matching transactions in QuickBooks Online.

Let me know if you have any other issues or concerns about bank transactions by leaving a comment in this thread. I'm more than willing to assist. Have a great rest of the day!