What Causes Elevated Levels Of Vitamin B12?

I good some lab tests done Dec 2013 I had my b12 tested it came back high 779 pool/l high and then I got done Febuary 2015 848pmol/L High all she said was cut down on supplement.But it was when I notice my Transferrin Saturation was high Dec 2014 0.58 And Then in feb 2015 it was high also 0.56