What's the point of online checking in then? I thought it was something that meant 'I'm 100% absolutely coming now!' - but if you check in so early, what if something comes up - you break your leg 2 weeks before your scheduled date, and want to reschedule so you're not on crutches the entire trip?
Do you just 'undo' an online checkin and reschedule? I wouldn't think cancelling a reservation was possible after an online checkin?