How do I fix PayPal transactions that are doubled up in both Sales and Expenses?

I can help fix your PayPal transaction concerns, rdagility.

QuickBooks Online will import any transactions affecting your PayPal account. We cannot prevent the sales and expenses from syncing. 

To avoid duplicates, categorise the imported app transactions and exclude downloaded PayPal transactions from the Banking page.

Here's how:

1. Navigate the Banking menu.
2. Select the Banking tab, then click the appropriate bank account.
3. Click the For Review tab.
4. Tick the checkbox of the transactions to exclude.
5. Tap Exclude.

Additionally, here are some articles that will assist you in managing PayPal transactions and keeping your accounts updated:

• Accept Card Payments with PayPal app FAQ
• Learn the reconcile workflow in QuickBooks 

I'll be right here to assist if you have more questions on this matter.