Hi there,
It's essential that all of your transactions are reconciled properly so that your books are organized and correct.
When reconciling your transactions, make sure that you've selected the proper date range, and that you're referencing your bank statement. If you've already reconciled for January, ensure that all of your February transactions have been given the correct date and that there aren't any duplicates.
Another thing you may want to refer to are your automation settings. Click the Gear icon > Account and Settings > Advanced > Automation. Try turning off the settings that automatically apply credits and payments.
Lastly, check your account for any recurring transactions. Click the Gear icon > Recurring Transactions. Anything recorded here will automatically generate a transaction in your system, which could be why you're seeing the expense recorded twice.
Here's a few resources you can check out that'll come in handy:
I hope this helps get you back on track. Feel free to reach out if you have any other questions.
Have a great day!