His picture..?? Clearly shows that it tracked one direction and back the other in what appears to be equal amounts.
The fact that people can look at that picture without measurements and say “yep, looks good to me!” blows me away. I agree that it looks decent in the sense that it went up and down and is relatively equal but those groups could have been 5 inches apart. You must have a pretty good calibrated eye if you knew there was 6.3” between groups...