problem with scores on trivia type quiz

Hello,
Recently bought Vquiz and created 2 quizzes, type trivia, consistent of 6 questions each with for each question 3 possible answer with respective scores of 0, 3, 5. Each time a quiz is played i get a score dependant on the answers given a total score of 0, 5, 15 or 25 which doesn't correspond with the real values of the score which could be any value between 0 and 30. What am i doing wrong? or is it a bug?
If needed i could sent csv files of the quizzes and the results. (in Dutch)
Best regards,

Niek

Hello,
Please share your backend & FTP login credentials via Contact us form, we'll look into it.

I've just sent you a mail with the credentials by your contactform
best regards,
Niek

Hi Daniel,
Did you receive my email about the credentials? Did you have the possibility to look into the problem?
Best regards,
Niek

Hello,
We haven't received any Email from your Email address.