I have a jeep Comanche v6 automatic 4 wheel drive. It has a button for comfort

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I have a jeep Comanche v6 4 wheel drive automatic it has a button to change from comfort to power could it be bad and cause truck to change gears funny? It won't maintain speed without shifting. At 55 you can't barely hit gas to maintain speed but will change fine if you give it more gas or a little less. Doesn't slip or hesitate just seems to downshift even when you try to maintain a certain speed.