The label does not follow the pattern piece when its location has changed.
This is very annoying feature when having multiple pattern pieces (specially small ones). When using new measurements or changing the design so that the pattern piece location changes to the origo, I have to go an check that all labels are correct. In small pieces the labels many times are out side of the piece.
If you save and close and reopen the file the labels seems to follow. This is probably not the best way to do it.
I attached the sample file to illustrate the situation. If you change the length of point A3 to values 3, 5 and 8 and look the Box 2 label in Details mode you see the effect.