Help with thread sleeve..please!!

[Shaylen]

This is my frist time working with thread and i am loving it,on the pattern im working on it states

 

Row 2: Slip st to the center of the first ch st bow, 1 sc around the bow, * ch 5, 1 sc in the next ch st bow *, repeat from * - *. Repeat row 2 until the sleeve measures 20 cm [7-7/8"].

Now inc each ch st bow to ch 6. Continue in this fashion until the sleeve measures 28 cm [11"]. Now inc each ch st bow to ch 7. When the sleeve measures 38 cm [14-7/8"], inc each ch st bow to ch 8.

When the work measures 46 cm [18-1/8"], divide the work so that 1 square at the bottom of the sleeve is at the center of the hand and crochet back and forth. Finish when the sleeve measures 52 cm [20.5"].

I have done fine all the way to the red section i have highlighted.

Does this mean i turn and go back and forth and join each time,or only half way??Why would it stop going in the round

Im pretty good at following patterns since ive been doing it for 30 years but this one has me stumped

 

Thanks

Shaylen