I had a problem very similar to this with So Saffron! (Glad to hear it wasn't just me!) When I first opened the package, I picked that one up and it was oily... Then I opened it and could see oil around the ink pad itself, but it seemed to have some ink left in it. My concern was that it would dry up really quick, so I contacted my demo, who went to SU! and sent me a return mailer and brand new set of Rich Regals.
With that said, I would definitely contact your demo to see if they can replace your spot. HTH!