I'm in the process of replacing a bunch of light switches in my house because several of them cause the lights to flicker if you wiggle the switches around, and some seem really loose and worn when flipping on and off. I was expecting to deal with just two and three- pole switches, then I came across this setup that's a bit confusing. The right switch of the pair in the wall, and the switch by itself will turn a kitchen light on and off. You can have either of the switches in any position and make the light turn on/off with the other switch. They are also not labeled on/off on the switches. On the switch by itself, the screw on the top right was removed. There's also a flood light outside that doesn't work, and I kind of wonder if it's wired to one of these switches as well. Can anyone help explain what's going on with this wiring? Any help's appreciated.