quiz problem

Dear,
I would like to inform you that I have some problem in LearnPress, exactly doing the quiz.
our students when doing the quiz. they can’t do it properly as it jump to odd numbers
what i mean is the do question 1 then click next it’s question 3 then question 5. even if they want to do previous they get the odd number.
Result gives half question skipped.

please can you look at this problem

thank you