lock questiont to top of group not working
I've developped a quiz with quizmaker '13. There are 12 groups of questions. In each Group I've set a randomize option of 6 questions random out of 10. In each Group there is a first slide of instructions (blank slide) that has to appear before the 6 randomized questions.
When I block the first slide of Group 1 and then - for instance - the first slide of Group 2 and I save the work, one of the two blocked questions is not saved.
Idea of what is wrong?