I'm trying to understand some behavior in the streamlines that I don't completely understand. I've documented the problem in a notebook here:

The notebook has a full statement of the problem. In essense, I'm not sure I understand why streams that I believe should terminate instantly upon launch (because they should walk directly out of the box) have thousands of elements in them (instead of one). I assume there are one or more misconceptions in my understanding, and I'd really welcome any suggestions. 

thanks,

Jeff