"Increase on row 5, then work 11 rows and the 12th row is 17 where you increase again." So you increase on rows 5, 17, 29, 41, 53 etc.
One thing you can do is knit the two sleeves at the same time with 2 ends of yarn. That ensures that all the increases are on the same rows and both sleeves are the same.
Good luck finishing this sweater. You're almost there!