Shifting a Repeating Event Unclear

I just shifted a repeating event with the mouse one day ahead and was not asked if this should also be done for alla future occurrences. So I became unsure of the properties of the event!

Shifting a recurrent event with mouse will only affect that single event and not future occurrences.
(And of course, it will ask you if you’d like attendees, if any, to be notified about that specific change)