Incorrect layer does not display in freeform pick many quiz
I set up a freeform Pick Many quiz slide (I would attach the file, but keep getting a server error when I try to upload to this site). The user must select two out of four radio buttons in order to get the question correct. When they choose the correct radio buttons, the Correct Layer appears as appropriate. However, when they select the wrong radio buttons, and click Submit button, nothing happens. I'll continue to select wrong answers to no avail, but once I input the correct choices, and Submit, the correct layer appears and I move on.
Here are my quiz settings:
It seems as though Feedback or Score "by choice" as opposed to "by question" is not an option for the Pick Many question type. Only "by question" or "none" are settings to choose from.
Thanks for the help!