Lines: relative position of end (hook) changes when layout changes

MS 3.3 (but probably older)

1. Open the attached score. Select measures 1-6 and use the "R" shortcut 4 times to copy the contents forward—filling up the empty measures.
2. Now look for the first instance of the following line (i.e. the one with the circled 6 in front) in the uncopied part of the score (mm 4-5).
   
3. Compare it to the copied versions of the same in MM 10-11, 16-17 and 22-23. In each case, notice the position of the end hook in relation to other elements in the score.
   Expected result: The relative positions should be the same.
   Actual result: In each case the end hook has overshot or undershot the position that it should be in (if you compare it to MM 4-5).