Hello. I have 2 gang 1-way switch controlling my hall light & outside light. I have purchased a smart light switch & are finding it difficult to wire it up. I thought I had it working correctly however, the hall light was constantly on & flickering. I had the black wire going to Neutral. Live wire going to 'L', the other red wire going to 'L1' & from 'L1' the jumper wire to 'L2'. Any advice, please?