Quote Originally Posted by Goshawk
did you use the workaround by richard123?
No, I changed nothing. I wanted to do as little fiddling as possible for the obvious reasons. My friends have decided to go live with their site this evening so they are confident the module is working. There may be a possible bug or requirement within the module that order priority has to be unique for each payment type. I believe this is also the case in Order Total modules whereas it obviously doesn't matter with product categories, etc.

Good luck sorting it out!