Hi, I only found out by accident whilst checking on other settings, it can be found at
My Account -> Preferences -> Account Settings -> Account Preferences -> Listing Enhancements -> Append Battlebids . .. to my listings
The item to click is the 'No' just above the line the 'Append . . ' is on.
I am currently waiting for a reply from support over how to identify & eliminate this feature from listings I posted late last week.