As far as the first question is concerned, my current thinking is if I begin the trade on a 5-day or a 2-day I wouldn't add to it when the other one gave a signal on the second day. However, other than doubling exposure in the same security, I don't see anything wrong with it.
As for the second question, if I get in on a 5-day signal I would get out on a 5-day signal. Same with the 2-day. Also, if the 2-day and 5-day give a buy signal on the same day I treat it as a 2-day buy signal and would, therefore, get out on a 2-day sell signal.