nick is talking about a garmin unit right? not magellan. before i learned how to save a tracklog with my magellan explorist, i brought it home with the active tracklog and tried to upload to the computer with TF just like i always do with my magellan sportrack. but it wouldn't work. in fact, there is a couple lines of text in the gps dialog box in TF that says you have to save the track on the explorist unit, then you can simply open the file.
so is what your saying also take place on the magellan: that after saving active tracklog, all the timestamps are stripped away so the data is just X,Y,Z?
so then, maybe there is a way to upload the active track from an explorist so the time calcs show up and everything, like the sportrack