I've wired a 3 way switch according to the diagram! Have a problem with the 2 way switch and light in the power run before the 3-way switches. Have power coming into a 2-way switch. This then runs to a light. I've pig tailed the hot so I can continue on to a light that then will become part of the 3-way. I've hooked the white wires together in the 2-way switch box. My 3-way works OK, but the switch before it is the one that only works when the 3 way is off. I didn't think that the 3-way would interfer with anything on the power run before it? Mine seems to.