Unable to jump back to original slide

Hi,

I have came across a strange situation where I am unable to jump back or move behind to a previous particular slide.

On my project, I have added a custom navigation bar on slide 3 which has Menu, CC, Volume, Play/Pause and Back-Next buttons set to continue playing for the rest of the project.

Now when i try to assign a button to jump back to slide 5 from slide 10, it is only going back to slide 9. I have tried Go to the slide last visited, Jump to slide <slide#>, also used advanced where i am checking if a particular variable value is 1 then it should jump back to the respective slide. 

I tried to view the branching view to understand the linkage of the slides but the view does not show the complete navigation for all the slides.

I have around 50 slides, slides 6 to 8 i have hidden. Slides 13 to rest appears as unlinked although all of them have their previous and next buttons set to move back and ahead one slide.

Here's the quiz settings page.

I disabled the Branch Aware checkbox, since I needed the playbar on the skin to appear so that i can test the course. Any suggestion on what I can do to get back from a slide?

Thanks