After you do row 10, keep increasing 8 sts every other row, on the RS rows the same way you were on the first set of rows. The knit front and back increase you found is another way to do it, but your pattern does the increases with yarnovers, the 'yf'. Notice it says 'yo, k4', then the next inc row is 'yo, k5'? So then you would yo, k6 and yo, k7 and so on until you get to the number of stitches for your size.
sue- knitting heretic