Railing Panel Compresses in Y Axis

[sutcac]

I have seen this behavior before but really wanted to get to the bottom of it this time. In the pics you will see the Tube railing panel as placed in the railing dbx, and then the very same symbol placed independently. Why does the railing panel get compressed in the Y axis when placed as a panel within the railing? I have tried adjusting the newel width, the balluster width, and the width of the wall definition itself and nothing makes any difference. Any ideas?