I was curious if anyone else has noticed this. Before iOS9, when I would enter a new calendar event, I would give it a name, start date and time. I could also set two alerts to that event for a time prior to the event. The initial "Alert" was set at one of 9 preset times and the "Second Alert" was set, from the same list of preset times, but for a time somewhat closer to the calendar event. Under iOS9 if I try using that method, the entry for "Second Alert" causes the initial "Alert" entry to be changed to match that of the "Second Alert". Under iOS9 it seems that the "Second Alert" entry must be for a time prior to the initial alert time rather than after it as had been true before. The same is also true of my iPad as well. This is happening with an un-jailbroken iPad 3 and an un-jailbroken iPhone 6.