Hi there, Eunos.

Some transactions in QuickBooks Desktop are presented differently in QuickBooks Online due to the difference between the two platforms.

I understand that you've already contacted our Support team about this. However, I'm going to let you contact them again to check your transactions further using more tools. We have limited access from here, and it's better if we have a visibility on your records before suggesting to edit your transactions.

If you have other concerns, feel free to go back to this thread.