I can't find a visual so I will try and explain, If you look at your purl stitches on both side you will see they are made up of what looks like an upper and lower staggered like bricks (hope I am not confusing you)that counts as 2 rows. Ok now on how to figure out what row you are on, you should have a "tail" that was at the beginning of your project. I am assuming that you are right handed. After you casted on your required number the "tail" would have been to your right. You would of had to turn your needle making the "tail" on the left. Row 2 "tail" to the right. For me I count rows when my tail is the the left, then count by two's. Does that help or have I confused you all to pieces ?