Not able to retake questions
I think i'm on the verge of tears on this one.
I have my project set up so that it when a user takes a course, they answer questions throughout it. At the end of the course, they get a certificate of competency. If they get a qustions wrong during it, they get kicked back to an earlier slide and then retake the question. This works fine for the first three questions however after that, if someone gets a question wrong they physically can't retake the question as the check boxes can't be selected (It's stuck on their last answers).
I find this really strange given that the first three questions don't have this problem at all.
The settings that i have are as below:

I have set this up also in' All Questions Must be Answered' and 'The User Must Take this quiz to continue' as well but no joy.
Cheers,
Ian