I thought about this a little more today, that is exactly how we used to have the shift points, enough people complained they wanted to show just upshifts or just downshifts so we changed it.
The answer as already noted is to make it user configurable, something Paul may implement in the version 8 tuner.
Check this out from our revision log for the LS1 calibrations:
v7.12 | 2004-Aug-01 | Split D0903 into two cals (upshift and downshift), new table is D0906.
And since then that is the way we've done it.