Wah! My grey stripe seemed quite wide and I still had a couple of rows to go. I counted and found that I had two more rows than I expected. Oh dear, time to rip back a stripe.
Then I counted the rows on the previous teal stripe. Two rows too many. Waahhhhh!!! Fortunately the grey stripe before that is correct, but I have to rip back 40 rows and do it aaaaaaall again. *sigh*