We have some WONDERFUL "auto-lister" tools that rarely screw up (like this), but when they work right, they save us lots of time, vital when you are listing 2,000 items per week.
In this case, it is set to add that phrase whenever the size is "non-standard" to what we are currently auctioning. Obviously, in this case that was set to 27x41, so it added it to a 27x40, even though it makes no sense (auto-listers have ZERO common sense)!
Bruce