Testing

Hi there
I am quite new to Rise360 training development. 
I have 3 tests which appear throughout my training module, and 2/3 tests comprise a set of 6 questions, but the 3rd is showing 7. 
If the questions databank is higher than 6, and a set of 6 is randomised and displayed, how is it showing 7 in the test count and how can I change that?
Many thanks!!