DECLINED: RadScheduler already supports saving/loading exceptions (set via the MasterEventId mapping property). The issue here seems to be in the database setup but the information provided is insufficient to reproduce the case. 

1) Create new reccuring appointment
2) Open some occurrence of created reccuring appointment
3) Change end date, click OK
Here will be first problem - reccuring on this occurence icon not changed (see attached screenshot).
4) Save data to DB
5) Try do delete saved occurence of reccuring appointment
6) Save data to DB
Here is the second problem - this will not delete.