Prevent a question from be randomly selected twice from a question

I used Pat Simon's suggestion above and it works. However, even though I put these new triggers at the beginning of each question, it displays the re-asked question for a moment and then moves on to the next, and if that one was already asked, it then shows the next. Unfortunately, it briefly shows the already asked questions, which could be multiple ones, until it finally gets to one that hasn't been asked. So, it might be confusing for the learner to see this. I agree that showing a question that has already been asked IS a bug in Storyline. Other authoring tools don't have this issue and the bug should be fixed or the question pool functionality needs to be redesigned so we don't have to do these work arounds.