Sorry, we had visitors so I wasn't on here. It did trip again yesterday (Saturday). Both always trip at the same time. So this time, five minutes before I turned off the one to the plugs. Sure enought at exactly 8:48pm last night the other one tripped. So that breaker is supposed to only feed the lights (most of them recess lights). I checked the clock and it was to the minute. So next week (it will be now on Friday since it is on the seventh, not eighst day) I am going to turn the other breaker off (the ones with the lights) and see if the one that was shut off yesterday will trip by itself. I will take a look at the meter in the morning and see if it says DCSI .