The 2way splitter sends 1/2 the signal to each leg if you connect another 2 way splitter to one leg you lose another 1/2 the remaining signal. At the outputs of the second splitter you have only 1/4 of the original signal so any signals that were just acceptable out of the first splitter now are too weak to produce good pictures. The best cure is a signal amplifier to boost all signals before splitting.There is a 2 way split and I am running a cord from that to another 2 way and connecting the 2 back bedrooms
When I go over there tomorrow I will eliminate that extra wire and see if that helps
Thanks