Flights are removed and added all the time. Look at an OAG for examples. This is one very nice reason to have a valid telephone number in the reservation or your in profile. If requested, they will refund you money. If firmly requested, they often will re-book you on another carrier without cost for the changed segments. And yes you get the original ff miles. I have found most major airlines have exactly the same policy (or at least had the same policy).

MisterNice