How do I stop duty rotas or repeating events from clashing with other things?”
First, you need to be logged-on as an “administrator” to do this… Make sure that the event type (for the event that you are trying to work around) appears in the “Skip if clashes with…” list for the repeating event or rota in question. If it already does, then the chances are that the one-off event was entered into the diary after the rota (or repeating event) was sheduled, so go to the page where the event (rota) can be changed, and press the “re-schedule” button… voila!. Alternatively, administrators can directly edit (or delete) events that were inserted into the calendar automatically as a result of “repeating” events. However, any changes you make to these events may be lost in the future, if the definition of the repeating event itself is ever updated (and, as a result, replacement events are entered onto the calendar).