u/Infamous-Goat9188

Hi, I am folowing this tutorial https://youtu.be/DVi09tIPVpM?is=TJvei4ipDHIIHN0O

But my work is on one side always loose. My first attempt was with different yarn (bamboo) and I have to change pattern to simply knit, purl on the straps. Now I even bought the same yarn but it's still loose on one side. Does anybody done this and can help me? Many thanks in advance.

Photo is in comment.

Edit: I tried to change it a little bit - I slip last stitch in second row and knit it as first stitch in next row. It's sligtly better but I am stil not fully satisfied ;-)