I have 2 thoughts on this, both of which have already been mentioned, but just to reiterate:
- You’re not purling, but actually knitting every stitch. This will make purl bumps on both sides. Knitting all of the stitches on 1 side and purling all of the stitches on the other side is what makes it look like the Vs on one side.
- Try watching the videos, here. If that doesn’t help, there are also videos on youtube. Watch and see if your motions look the motions in the videos.
This is how the knit stitch works: you take the right needle and put it through the first stitch on the left needle, coming from the front, towards the back. You then catch/wrap/grab/however you think of it, the yarn, which is held in BACK of your work, with the needle and pull it through the stitch TOWARDS you. Then pull the old stitch off of the left needle.
When you purl: You come from the back to the front, then catch/wrap/grab the yarn, which is held in FRONT of your work, with the needle and pull it through the stick AWAY from you.
Does that makes sense with what you’re doing?
Is it possible for you to post photos of some of the scarves you’ve made? Close ups? We might be able to tell if it’s all purl, or garter stitch (knitting every stitch, every row) by seeing it.