I think the problem could be that you're using a graded question slide without anything to grade.
That might be "confusing" to the functionality built into graded questions.
Since you're using custom programming and scoring, I suggest you rebuild the scenario on a regular slide.
Thank you for responding. Unfortunately, it isn't that. I have amended it in the attached so that it is a normal slide. I have shown one scene with just the interaction slide on its own, which shows that the correct/incorrect layer shows when they hit submit. However, in the other scene I have added a second slide, and it automatically shows that slide rather than the correct/incorrect!
