problem with display of line feature marker line symbols between ArcMap and PDF

The marker line symbol on my map appears only once in ArcGIS (how I want it), but displays a line of symbols when exported.

This layout view in ArcMap:
Attachment 23556

Looks like this on PDF/EMF exports:
Attachment 23557


Has this issue been addressed before?

MXD, PDF, and data attached

Attached Thumbnails

   

Attached Files

• LineSymbol.zip‎ (221.1 KB)