Pandie Ebony and Ivory is a very dominant fur, based on Saga's dominance order for the fur, https://docs.google.com/spreadsheet/ccc?key=0Ak_Wqb33nVpndHhxT3RqQ1dtNV9WdDMtZUtaOGx0Q3c&usp=drive_web#gid=0. Have you checked the grandparents of this kitty from your pedigree site? What fur does the grandparents have? If you don't see a Russian Black and from either grandparents, then it is somewhere in the line (above the grandparents) that there is a Russian Black. Russian black will be the hidden fur for this line. It is just hard to say which side because we can only see 2nd generation from our Pedigree.
Another thing you can do and I do this all the time, lol, when you check your pedigree and you see who owns those kitties, check their store if they have one. Check what kind of kitties they have so you can gauge and anticipate what kitties you will have based on their cattery. Hope this helps.