archery question- string movement

[BassAssasin]

OK, so the "geniuses" on Archery Talk say that the way a camera like a gopro take a picture makes it look like this. They say the camera scans from the bottom up so it makes it look this way.
Im inclined to go with that explanation because I am grouping pretty good out to 60yds, and that seems like it would be impossible if my string was really doing this