Does anyone know how to fix these problems?

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Occasionally, my dash lights will flash. ALSO, my car locks by itself and unlocks by itself (for example, when I arrive at work I lock my car and double check it. However, when I return to my car to go home, it is unlocked - and - when I arrive at home for the evening, I park my car in the garage leaving it unlocked and when I go to leave in the morning, it is locked.) This happens daily. I left my keys in the car once, and it locked even though it isn't supposed to lock when keys are inside. ALSO, when I go to leave in the morning, my hatch is opened even though I didn't open it. This happens about once every couple of weeks.