I agree with ADTech, something is very wrong. You are already in overload territory even before adding antenna gain. WOOD has a NM (Noise Margin) of 72.7 dB.
Interpreting Noise Margin in the TV Fool Report
http://www.aa6g.org/DTV/Reception/tvfool_nm.html
How do I troubleshoot my CM7777 preamplifier to make sure it is working correctly?
http://support.channelmaster.com/hc/...ing-correctly-