Hi Tim,
Ok, this means that PDF1 is not being used.
This is an application issue.
I recall one case where the default PC printer was being used in SM30 _> WCVL1 view. But I don't know whether it is the same case as for SRS printing. You may check your customizing and see whether you have a similar scenario.
You can also ask your ABAP developers to debug the coding and see which entry in the table view is being used. If you decide to involve the SAP support application team, please raise your incident under LO-SRS.
Kind regards,
Cris