I picked up my knitting when tired and didn't check the work but believed my own notations on the pattern and .... repeated a knit row in stocking stitch .. ahhh it took 6 rows of 138 stitches before I noticed (the light was not good either).
A silly mistake but I learned 3 things:
Know when you really are too tired to do 'just 1 row'
Don't believe the idiot that marks off the pattern (i.e. me) check and check again!
I need a new lamp