Question bank - Questions marked to always be included, are always positioned at start of question draw

Hi Wendy,

Please could you review this project and the script just one more time for me.  It is working fine, but just got a query from a mac book user saying that they had a problem. 

"I took the chemical safety test and did not pass the first time.I went back in to take it a second time - I know not all 13 questions were asked and the end of the test came and said I failed - I only answered about 5 questions.I went in for a 3rd time and noticed after answering the 1st question, and hitting the submit button, the bottom left of the screen said I was on Question 3 of 13. I figured if I only somehow missed question 2 and couldn't go back I would still pass with only 1 question missed. Next screen showed  question 5 of 13 and then the exam ended. I failed again.I took the chemical safety test and did not pass the first time.I went back in to take it a second time - I know not all 13 questions were asked and the end of the test came and said I failed - I only answered about 5 questions.I went in for a 3rd time and noticed after answering the 1st question, and hitting the submit button, the bottom left of the screen said I was on Question 3 of 13. I figured if I only somehow missed question 2 and couldn't go back I would still pass with only 1 question missed.  Next screen showed  question 5 of 13 and then the exam ended.  I failed again."

However, I do not see any of these happening in a PC and Chromebook within the Chrome browser.  Nor did the user.  Could it be just a mac thing?  The user just took the exam on a Chromebook and passed.

I am enclosing the project and the script for you to review.

Many thanks,

Indrani