In SO-A, after entering a Kit type item, if you Tab or Enter through the line that is inserted by DBA that says "Kit Consists of:", it deletes the "K" from the Lin field, and you can't put it back in (well, you can, but when you complete the line and look at it, it's gone).
 
It wouldn't be a problem if you want it to print, but if you don't (we don't) there is no way to suppress them. The work-around at this point is first to try and remember not to review that line, but if you forget and do go through it, you have to delete it.
 
It's taken me a while to figure out what was causing that line to print, so I'm not sure when it started, but probably with the November update?