I have noticed a similar phenomenon with my TV remote (Pioneer plasma); occasionally when I turn the TV off, it turns on my Primare pre-amp. Generally, I have noticed that most of my remotes act strangely when the batteries get weak. I cannot tell whether there is a cause and effect relationship here, or mere coincidence. And what has made diagnosing this difficult is that it is a random, non-repeatable event. You could try fresh batteries to see if it alleviates the problem.
Bob R.
Bob R.