Change bars from Word do not transfer over when converted to PDF

Hi Everybody and thanks in advance for your help, 

I am a technical writer, dealing frequently with change bars. The way I do change bars, and this is the simplest way to do them, and be able to remove them in subsequent revisions, is to use track changes. I compose the portion i am changing and complete all of the formatting with track changes OFF and then copy the revised section > delete it > turn on track changes > and paste in the change. 

This works well for the companies I write for and since I am creating this for an end user, manually doing change bars with an outsode border is more difficult and time consuming at each revision. This way, when the next revision comes up, you just accept all changes, and the change bars are gone. Quick, easy and simple. 

These change bars however for some reason do not popuate when converted to an Adobe PDF. 

Anybodt have any feedback on this one?

Thanks,

-Tanner