Course does not resume properly, "Would you like to resume..."

We are running Articulate 09 courses on Moodle 1.9.  We have a class presentation that is over 150 slides together with audio for each slide.  Four people in the office have tested the resume function.  Three are using IE8, one IE9, all have Shockwave Flash V.11.x.  For two testers, who go many pages into the presentation then exit, the "Would you like to resume…" dialog that pops-up in the course's beginning returns the course to slide 1.  For the other two I am told the resume feature worked.  One of the two is running IE9.  IE setting along the path: "Tools" menu/"Compatibility View Settings" menu item… seems to be an irrelevant factor.  I watched as a user using IE8, on slide 100, exited the presentation.  When she gets back into the course and selects "Yes" to the resume dialog, it returns to slide 64.  Slide 64 is where she left-off last night. 

I made a small Articulate test quiz and placed it on the LMS.  My browser returns to slide 1 on the large presentation but DOES return to the correct slide with the small quiz.  For the other person, who returns to slide 1 on the large presentation, when he runs the small quiz, the course always returns to slide 1.  Does anybody have any idea what is going on with these mixed results?

I consider the template setting to be found along the path: "Player Templet: <Template Name>"/"Player Templates (Specify the behavior and appearance..."/"Player Controls" side-tab/"Miscellaneous" region/"When running in LMS, ignore Flash cookie" check box control.  Should this be unchecked?

Thanks,

Jeff