Using variables to guide navigation - stuck!

I am trying to make it so that the 'next button' at the end of scenes 2 to 7 will navigate back to a 360 image in scene 1, if those scenes haven't all been visited. The 360 image in scene 1 has 6 markers, linking to scenes 2 to 7. This is working fine, except...

I am also trying to make it so that the 'next button' at the end of scenes 2 to 7 will navigate to the start of scene 8 if scenes 2 to 7 have all been completed. I've used variables to track which of those scenes have been done, and set the next buttons to go to scene 8 rather than the 360 image in scene 1 if all those variables are 'true'. But I can't get this part to work - it always goes back to the 360 image in scene 1.

The trigger to go to scene 8 always comes before the triggers to go back to the 360 image in scene 1.

Any ideas what I'm not doing? I've spent hours trying to figure this out, and really stuck!

Thanks

Tom.