Another thought, did you restick or use a drop from the same site? The second drop from the same site can also have a different sugar level or if the blood has thinned out and been wiped on a tissue this can make the reading lower. Lots of things can be behind the differance.
Main thing do not panic. Both are good readings.

__________________
Janlaton
type 2 40 years
Avandia, Glipzide & Metformin
Grandmother to 4 wonderful children
I have diabetes, It does not have me!