Complex sentence: In an unprecedented decision by station executives on Mid-February 2007, the station started playing more of their old format than to just Reggaeton 24/7, some of the past month's schedule changes are to blame for this format mix-up.
Split into simpler sentences: In an unprecedented decision by station executives in Mid-February 2007, the station started playing more of their old format as opposed to just Reggaeton 24/7. Some of the schedule changes were to blame for this format mix-up.