When the invoice is 2 pages, print boss is sending two emails with one page each
There is a setting in print boss that addresses this behavior. Open print boss and go to Options / Email Settings. Click on the Misc. Settings tab. Check the setting 'Combine pages into a single email'. By default, this is set to 'Never combine'. Select the option for 'Same Email address AND same DocNo' to have both invoice pages combined into one pdf file and sent on the same email address.