Your location behind a large hill that is in the direction of the towers on Queen Anne Hill. That means that the signals are going to be sharply diffracted and greatly weakened as that pass over that hill into your lower elevation location.
It's a common occurrence for the signals to become very scattered with pronounced dead and hot spots on a per channel basis. you might find one spot for the antenna where certain channels work but others don't and a different location with a difference combination channels.
An amplifier will NOT help as the signals from the towers downtown are unobstructed and their very strong signals will overload most indoor amps or the tuner itself. I tested the amp that comes with the SS Blade and found it overloaded very easily.
Most likely, if you can't find a sweet spot, you'll probably need to step up your game from the flat antennas to something with some real forward gain. That means something a LOT bulkier than what you've been trying. Our ClearStream 4V would be the maximum upgrade, the ClearStream 2V might do okay.
Good luck!
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