Your confusion ends here, @User54376.
Allow me to fill you in on everything about the vendor information populating from the Form 1099 and check payment.
QuickBooks is depending on the information entered on the field. Please know that the information populates on the 1099 form are Vendor Name, Company Name, and Full Name: First Name, Middle Initial, Last Name. To ensure the company name isn't duplicated, you'll want to check the information on each field aren't entered twice.
At this time, the solution we can consider right now based on your concern is to manually modify the name in the Vendor file when printing 1099s.
You might want to check out this article to learn how to prepare and file your federal 1099s: Create and file 1099s with QuickBooks Desktop for Mac.
Please let me know if you need clarification about this, or there's anything else I can do for you. I'll be standing by for your response.