Sounds to me like that channel 2 signal is very strong and just overdriving your system. I would add a channel 2 band stop filter http://www.tinlee.com/MATV_Filters.htm
CR7-Series: Semi-Adjacent Bandstop (any channel 5 to 800 MHz)
Tin Lee is a Toronto based company thats the best source around for traps and filters http://www.tinlee.com/
CR7-Series: Semi-Adjacent Bandstop (any channel 5 to 800 MHz)
Tin Lee is a Toronto based company thats the best source around for traps and filters http://www.tinlee.com/