course navigation not collapsing

Hi 

In testing my course, I notice that the left navigation is not automatically collapsing all the sections. It auto-collapses just fine for the first 4 sections. The remaining sections all stay "open" as the user progresses.

I have the menu options settings checked off to auto-collapse. Why is it only working for the first 4 sections??

   

 

Firefox - Flash: All sections collapse except Case Study 5

Firefox - HTML5: Sections 1-4 collapse. Starting with section 5 they do NOT collapse (5-12 do not collapse)

Chrome - Flash: All sections collapse except Case Study 5

Chrome - HTML5: Sections 1-4 collapse. Starting with section 5 they do NOT collapse (5-12 do not collapse)

IE - HTML5: Sections 1-4 collapse. Starting with section 5 they do NOT collapse (5-12 do not collapse)