Thanks for coming back to this discussion, and for your video, Susan. Sorry about "pushing" you for an answer.
Indeed your video shows that the display for the student viewing their own response is not what it should be. There are actually 2 (related?) problems with the display you are getting.
- as you mentioned in your message, the selected element in your dropdown box reverts to the first element (rather than the element selected by the questionnaire respondent)
- the selected element is not displayed to the right of the drop-down box, as it should (as displayed in my previous answer)
You could try to upgrade to a more recent version of Questionnaire.
Another possibility is the Moodle visual theme you are using (what is it?). You could try switching to a standard theme such as Boost.
Finally, which platform and which browser are you using? You could try switching to different ones to check that the problem is still there.
I don't think it's related to your questionnaire settings, anyway.
Please keep us informed so we can help solve this intriguing happening.
Joseph