I have an app which shows satellite orbits defined with czml. These orbits are displayed with leadTime and trailTime similar to the sandcastle examples.
A typical CZML file will contain orbits for a time range of a 3-5 days.
However, when displaying the orbits, if my code changes the time to a few days into the future, then all the lead and trail times are bunched up together, so that they become a thick band surrounding the globe, rather than the normal thin line.
I have created a sandcastle example showing this behaviour:
(Click the button in the top left to change the time)