Come on guys. Get real. How many times a day, a week, a month, a year do you walk into the same room, and say something very similar to the same people. All the time. You get so used to it, you slip into a kind of fuzzy mist.
Maybe that process just skips a beat, goes through the whole checking routine, and says, yep you have been here before.
Most of the time you probably have, exactly the same, its just your brain does not tell you, because its obvious.
What is unsettling if it is a new situation, but then your brain could just be playing games, and actually got the confirmation wrong. It would not suprise me, because most of the time the brain cheats, and tells you it has checked everything out, and it has not, which is why car accidents happen, because you literally did not see that other car.