Results slides remove Blanks

HELP!

 I have several question banks. 5 of these are mandatory and 2 are optional.

 The problem I have is that when I do not select any of the optional question banks these still appear in the results slide which are marked as incorrect.

 I have tried unsuccessfully with editing the results slide properties as well as a variable to send the results to the results page when completed, neither of these work.

 Does anyone have any ideas how to get around this?

 Thank you in advance

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