You can edit the correct and incorrect feedback text captions to your wish... add more specific explanation, if you want to continue with question slides.
I think your approach is bit too complicated. You can trigger only one advanced action by one event, although that action can be very complicated (using conditional actions with multiple decisions). Wondering why you use shapes instead of TEB's that have alread an associated variable by default?
http://blog.lilybiri.com/one-submit-button-for-multiple-text-entry-box
Lilybiri