are the marks on the back raw marks - my result slip grade doesn't match edexcel's we

are the marks on the back of the result slip raw marks? My result slip grade doesn't match edexcel's website, on the back it says the mark and then the grade next to it but edexcel says that mark is a higher grade?? I'm a private candidate so i'm not keen to harass the school but i'm shocked at my grade and i'm pretty certain i want a remark.

No - they're UMS marks. See here for more information regarding UMS: http://www.thestudentroom.co.uk/wiki/MS (most of it is to do with A-Levels but a lot is still relevant to GCSEs). :-)