Disappear after click - reappears again?

[Amba_Gambla]

Hi
I'm new here, but I'm losing my mind - I have Googled it to death, and still can't find an answer!

I've made a powerpoint quiz (all singing, all dancing) - my main screen (slide) has 48 numbered boxes (questions 1-48). I've made it so when you click on the number, it takes you to that question and the number disappears, leaving just the remaining questions. You answer the multi-choice question, it gives you a point score and then takes you back to the question screen (minus the already asked questions).

The problem is....


When there is a bonus question - ie: a more complicated chain of hyperlinks, then you go back to the questions page, it's reset itself and shows all the numbers. I didn't quit out of the slideshow, but they're all there!

Can anyone help, and/or suggest what is going wrong please?

Thanks

Ambla