MarketPress: version 3.1.1
I am currently still in beta for MarketPress. I've found a bug recently with respect to the Invoice Add-on.
When I enable the "Invoice PDF "Add on in the store settings, set How do you want to view the PDF to "Download as PDF" and I checked off the setting Attach Invoice to "Customer Order Shipped Email" what happens may be a bug.
The customer gets both the invoice and the packing slip attached to the order notification email . The customer does not need a copy of the packing slip. Just the email in the Admin Notification Settings should get the packing slip correct?