alrite, not quite sure what i should make of these numbers

i got my hands on a 9 speed cassette so I measured from the end of the cassette to the 5th cog to be about 11mm, with a hub length of 130mm that would give me a chainline of 54mm

seat tube O.D. is 28.7mm
using a caliper the distance between the seat tube and the middle of the 2 chainrings measure 34.29..so the front chain line is 48.6mm.

does this sound right?..i remember reading on the sheldon brown website saying something about a road double should be about 43.5mm?