My first cycle from my miscarriage was a 26 day cycle, mine is usually a 25 day cycle and i O'd on CD 15 according to FF and i O normally on CD 12 so the length of the cycle is quite normal but i never usually O that late.
Everyone is different. I think some woman O in their first cycle from the miscarriage and others don't ovulate to the 2nd cycle since the m/c.