Hi and welcome!
When you drop the double yo on round 2 you'll find that there is extra yarn in the slip stitch which is from the double yarn over. Pull up on that slipped stitch a bit (don't pull it tightly) to take up the slack yarn. I think by the time you've finished the row or even the next few rows, you'll see the effect of the pulled stitch. Do you have a pattern link or pattern name? It would be fun for us to see what the pattern looks like.