Hi there, BenTam.
Welcome to the Community. I'm here to provide some insight about the difference between the 2 !VEND lines on your bill payment.
!VEND indicates the transactions and information of your vendors, these details are usually found when you double click their name. While the VEND line indicates the name of the vendor that owns the !VEND details.
To know more about this process, please refer to this article: https://community.intuit.com/articles/1501233.
I'm just a post away if you have any questions about these concern or with QuickBooks. Take care.