When uploading a PDF file through the Vivid Seats Broker Portal, you may upload a file that contains other seats that are not intended for the Vivid Seats order that you are attempting to fulfill.
Once the file has been uploaded, each page of the PDF will be displayed, along with buttons at the top of each page that state "Include" and "Exclude". Click "Include" for all of the seats that you wish to upload to the order and "Exclude" for all of the seats that you do not wish to upload. The PDF file will be split appropriately after you click "Ship tickets". The customer will only receive the tickets that you chose to include.