Help with add-on overwriting

Hi all, Just bought my first 2 add-ons: Patrick Von-Raven's instant NPC cards and instant story cards. The first add-on adds 5 card decks and the second adds 4. The problem is that when I add them both, the most recently added one will overwrite the decks of the other. For example if I add the NPC cards and then the story cards, 4 of the 5 NPC card decks will be overwritten by the 4 decks included in the story cards pack. Has anyone had a similar issue and knows how to resolve this? Thanks

Try changing any duplicate names before adding the second deck. I have had to do the same before using add-ons that have the same map page names. Hope that works for you. 

Thanks Mark but no the decks all have different names :( even when I made 4 new default decks one pack overwrote the decks of the other and left the default decks alone. Even when I placed the default decks at the top (where the decks that get overwritten normally sit)

Moved to bug reports forum.