Linen cardigan pattern

I found the pattern on this site and have found some anomalies in the instructions. Row 3 for the back appears incorrect. Can anyone please clarify.

Welcome to KnittingHelp!
Yes, there are certainly sts missing from row 3. I don’t see any errata online but you might check yourself.
I’ll give it a try and see if I can fill in but I’m not sure about it.

ETA: OK, I haven’t tried this on needles yet but this would be my first attempt. If you try it, add in a lifeline now so that if it doesn’t work, you can frog back. Alternatively, try it on a swatch first.

Row 3: sl 1, k 1, psso, yo, k 1, [yo, S2KP, yo, k 1] 3 (4, 4, 4, 5, 6) times, yo, k 2 tog, pattern Row 3, k 1, (yo, S2KP, yo, k 1) 9 times for smallest size, pattern row 3, p 17 (21, 21, 21, 25, 29).

Thank you for the tip, I will try it and see if it works.