When I go to “Start Advancement” and add items for a trailman. Then I go to another trailman I don’t have the option to “start advancement” the tab is completely blank. When I logout and then back in it will allow me to “start advancement” for the trailman. Perhaps you are storing information in session that isn’t being cleared.
Regardless I’ve replicated this on all tries. I’m using Chrome as my browser.
Hope this helps you out.