Interaction jumping to next slide automatically rather than when click "next"

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. 

The issue stems from a shape in the button's hover state. You should isolate this shape (cut it) from the hover state and paste it onto the slide. Next, delete the trigger "Jump to slide next slide" and cut and paste it back into the hover state. Attached is a video demonstrating interaction.

Thanks, Judy. I would not have known if I had not experienced exactly the same issue when creating this hover effect a while ago. 

Oh my goodness, thank you so much Nedim!  I have never come across that before and it was really hurting my brain as to why I couldn't fix it - you are a legend!  I'll make sure I do all states before adding any triggers in future :)

Really good work Nedim.   I always forget about those pesky triggers that come along when you paste into states, and then you can't edit them once there, but you can see they are there!  Good thing for anyone to add to their checklist when debugging.