Highlighted layers keep looping

Hello all. I have this file that as the menu starts that voiceover explains the instructions, and then a series of Highlight layers engage at time intervals starting at 8seconds while th anarration is going on. I have set this up to happen automatically with a layer change at a specific time rather than state changes.

The user clicks any of the buttons to take them into the module slides.

once the slide is complete, the return to the main screen. If they make another selection straight away, no problem. If they wait for more than 8 seconds the highlight layers will restart, and wipe out the progress... it would appear.

If they then make a second choice, complete the slide and return to the main slide, their previous progress again is visible, but if they delay, then all progress will appear to be wiped out as the highlight layers restart.

What I want is the buttons to highlight once when teh slide starts, and then each subsequent return to the main slide, I want progress of slides visited to be indicated by button state changes, but I DO NOT WANT the Highlighted Layers to appear again via timestamps, this is the part I cannot figure out.

Essentially, I want the buttons on the right side menu to change colour only once when they first start the module.  Please help I am super frustrated.