That doesn't make any sense to me with signals that strong, unless your tvfool report is way off. Are you aiming your antenna at those stations, or are you expecting to get signals from all directions no matter how you aim your antenna?
I must have missed something in my analysis.
Maybe there is a problem with the equipment or wiring.
A CM7777 is certain to overload from a -17.1 dBm signal.
http://www.digitalhome.ca/forum/showthread.php?t=42426
Why don't you ask one of the DHC guys; they know more about your area than I do:
http://www.digitalhome.ca/forum/forumdisplay.php?f=186
You also have some very strong FM signals:
