All traces within a set should have the option of starting at the same time during an animation.
It's confusing for the traces which happen to be longer to start the animation before the shorter traces. The current process appears to equalize the trace set to the middle of the animation time, revealing the origin of the trace before the seed point. We should have the option of moving this middle-justification to the beginning of the animation so all traces appear from the seed point at the same time.