Adding Clip Markers in timeline

When I elect to view a clip in the project ["open in timeline"] I am able to add markers, but these markers do not appear, nor are they visible with the arrow next to a clip in the browser which indicates more information is available...

why don't markers set in the project timeline appear in the clip back in the browser... just to be clear - i am not dragging the clip to a project timeline - I am right-clicking and selecting "open in timeline" while viewing the clip in the browser.

thanks