Here is a link to the pattern
It does look wierd to me too.... here's my thought process:
The cowl is in garter stitch, and you knit it until it's 8 inches long
The body starts in stockinette stitch and has bands of garter stitch
Are the 6 inches supposed to be JUST the stockinette stitch of the body? So you knit 6 inches of st st and then you switch to garter stitch for the "garter stitch band"..... ?