We had all our light switches changed and have had problems with three of them. We have one light in our hall and one on the landing. downstairs we have two double switches. One double controls the hall/landing light and cloakroom. The other double controls the hall/landing and outside light. upstairs we have one single that controls hall/landing. now the switches have been changed the lights will sometimes only turn on/off is another switch is on. Hoping someone can look at this wiring to help me fix it.