I-cord challenge

I’am almost finished with the fall coat from Pickles. This is my first ego-knit ever, beside hats and scarfs. If you read last post, you know that I am binding off with i-cord. At first, I thought it was a bit tricky and time consuming. Now that I have the hang of it, I love it and I don’t understand what I was fuzzing about.

I still have some i-cord frustrations though, because I have had to do and re do the I-cord cast off two times. Both times for the same reason. The first time I casted off, it looked great on the front pieces of the coat, where I have knitted garter stitch. However, on the back piece of the coat, which is knitted in stockinet stitch, the coat-end rolled up. Therefore, I undid the i-cord and knitted two rounds in garter stitch on the back piece before I casted off with i-cord again.

This time it looks better but the back piece still rolls up a bit. Now I am undoing the i-cord cast off, for a second time. I have a vague idea or memory that I might have read about this problem on a blog…but I can’t remember which one (...I even think I made a comment and thanked for the tip).

Anyhow, now I am not sure what to do. Should I knit a few more rounds with garter stitch on the back part before I cast off with i-cord for a third time? Or perhaps there is another way of doing i-cord cast off than then one I used (I followed the instructions on this video from Drops Garnstudio)?

Whatever I do, this time it must work. I do not think I could undo the cast off a third time. Hints and help are very welcome if you think or know what may help.