so sorry, I overlooked this post, when it came in.
If you set the "Show next quiz" to "Yes", then when the quiz finishes the HotPot module is supposed to display the next HotPot activity in the current section of the course.
I just checked out this setting on a quiz my server and it seems to work as expected. If you are getting strange results, perhaps you could let me have a look at your site, or upload the quiz chain to my server and try it out there?
all the best