Quiz slides sometime shows Prev/Next and not Submit

Ashley- I am having a similar problem.  After publishing, my project plays correctly through the first time, but if the learner hits "prev" to review content, sometimes the 'submit' button changes to 'next' on my freeform questions.  I have not set any slide properties to do this; the slide is set to 'reset to initial state.'  When the rogue 'next' button appears, none of the answer buttons work. It will, however, advance to the next slide, until it hits the end of a scene.  At the end of a scene, nothing will advance. Sounds exactly like the problem Marie encountered. Were you able to fix this problem?  Is this a 'me' problem or an Articulate problem?