GG is right. The yo increases will gradually increase the width of the shawl. Trust the pattern.
“Row 1:K2, pm,yo,K1,yo,pm,k1,pm.yo,k1,yo,pm,k2-11 sts
(what does - 11 sts mean at the end? After the last k2 I only have 2 sts left anyway)”
The 11sts at the end of row 1 is telling you how many stitches total you should have on the needle when you finish the row. You started with 7 and there are 4 yarn overs which gives you the final stitch count of 11.
You should end the row with k2 and you shouldn’t have sts leftover or be missing sts. A yarnover doesn’t use up a stitch. Bring the yarn to the front between the needles, then over the right needle to the back. That’s it.
Blocking can mean wetting and pinning out to shape and size depending on the type yarn you used and the directions for washing on the ballband
Please, please edit your post to remove all but row 1 of the pattern. It violates the designer’s copyright to post a pattern here.