Welcome and thank you for posting here in the Community page.
I'd be glad to help check/review the uploaded transactions into your QuickBooks Online (QBO).
If you've connected your personal (bank) account into QuickBooks, the program will download the last 90 days of transactions recorded by your bank automatically. It will also match existing entries entered in QuickBooks and add new records for incoming transactions without a matching entry. This feature reduces workload and ensures your accounts are always up-to-date. You need to review each transaction if there are any duplicates.