Anyone flying Airtran from LEX?

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I have been looking at the Airtran flights from LEX. There is only one flight per day which makes me nervous since they change flight times so often. I am looking online and it shows morning flights departing MCO in August and part of September. Then the October flights are late afternoon. We really wanted to spend the morning in the park then fly home in the afternoon. Has anyone booked for a August or September return trip and had the flight time changed from afternoon to morning or were these flights already scheduled for morning departure when you purchased them??