Perhaps you were tested on different chips. I have a cousin who tested on an earlier chip and is still at R-L51 for a y haplogroup (origin 4100 BC per YTree) while I am at R-YP445 (origin 150 AD per Ytree) on the latest chip. (We're not male line cousins; I am R1a and he is R1b; he's from the male line of my Nana's maternal grandfather)