When I have setup a recurring meeting I am still allowed to change only single occurrences of that meeting (e.g. I am allowed to move to a different time). When I have done so, other people are allowed to book the times which got freed up on that particular date.
So far so good.
If I now decide to change something on my initial series (not necessarily the time) and save it, all past and future occurrences will be updated according to the original settings.
First of all, it would be nice, if occurrences in the past would stay untouched I any case.
And secondly, the system currently drops all occurrences of my series which are conflicting with newly created items. Preferably one should not update the times of future occurrences when the times have not been changed, or at least control it via a checkbox to let the user decide.