It's weird because it's working with my test data now even though I have the default additional form printer set back to pdf creator. If it acts up again, I'll try the alt+tab.

It didn't work today when I had an additional form to print for a cheque that had 280 invoices applied to it. I had to do a gridview report and export to excel then manually select the 280 invoices that applied to this particular cheque which took an extra 2 hours!