I went back through all my stash reports to double check. I had earlier reported some awkward fractions of 1/6 and 2/3 yards. Last report I decided to round them up or down or something and apparently that started my slide on the slipper slope.
So, the report in all accuracy should read.
Used this week 1 12/3 yards
used year to date 13 2/3 yards
added this week 0 yards
Added year to date 13 1/2 yards
Net used 1/6 of a yard