Purl all the stitches on the WS rows including the increases. If you knit all the sts on the RS rows you'll continue the stockinette stitch pattern. Put a marker on the RS row as a reminder to knit when you're on that side.
You shouldn't have an increase of 10sts across any row. It should always be an increase of 8sts each increase row. See if you can find the extra increase as you look at the last row.