CGCalendar Settings Problems

[the_obs]

Hello,
I am having problems with the Settings of the CGCalendar module. It would seem changing settings has no effect; e.g. selecting "Should the summary field be hidden" does not actually hide it, or selecting "Members of this FEU group can add events" does not restrict any other FEU group to add events. What I am particularly concerned about is the "Event Overlap Policy" and the "What should happen when a conflict is detected during editing or adding of an event:" settings. Members can indeed add overlapping events with no error message, and the overlapping (last added) event is displayed succesfully in the calendar view. How can I fix this?