The kitchen light, cable 2 or 3, was attached to cable 1 for power. It then
went to the light and the other switch. You connected it to cable 4, so the
other switchs also had to be on.

As I suggested before, disconnect cables 3 and 4 one at a time, and make
sure what they actually power. A CAD drawing isn't useful if you are not
sure what the cables do.