Advice needed on switching Electrical Advice

Advice needed on switching Discussion ThreadAdvice needed on switching Electrical Advice

I've encountered a bit of a head scratcher here. We've taken down the wall between the kitchen and the dining room for a new open plan jobbie. The wall had two light switches, one fed by three wires for the dining room light and the other a twin gang two way switch for the kitchen lights. I've moved them from there to the wall that divides the dining and living rooms, however, the living room, hall and downstairs loo will only work when the dining room light is switched on!

But there's a twist in the tale. When my son in law was eagerly ripping the plasterboard off the wall ahead of demolishing it he shouted me saying "those cowboy builders have buried a wire behind the wall. " I checked the wire (two reds, one live and one sleeved neutral) and it was live. I've switch all over the house and it remains live so I can only think that this could be the cause of my switching issue?

Can anybody direct me with only the rudimentary info I've given, the first two pics are the dining room light switch.

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