I started out by calling this other jumper an idiot, and they probably are, but the question is what do you mean about tracking up jump run, and what did they think you meant.
It sounds like they were referring, not to break-off, when you track enough to get minimum separation from the jumpers on your group, and instead literally tracking up jump run.
If that is what they meant then they should know that a premature canopy opening, or something else out of the ordinary like a canopy malfunction on opening will eat up that vertical separation from group delay in a nano second. Combine that with your movement relative to the other groups because of tracking, and you can get yourself a cozy coffin, or a rad wheelchair.
If they mean tracking at the end of a jump, well yes, you track relative to your group center, and you should track just long enough to get the separation. IF you left proper delay between groups, and the group order was correct, then that type of tracking for separation shouldn't be an issue and your focus should be on a heading that gets you the best separation from your group.