The Flatwave model FL5500A is not the best antenna for your plot.
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What "large outdoor antenna" and what "amplifier" did you use? If you can't find the model numbers please post photos.
Where did you you use it?
What direction did you aim it and what was between it and the towers (i.e., trees, houses, etc.)? I'm expecting roughly WSW (about 270 degrees towards Youngstown)?
If you were feeding 3 televisions what splitter did you use? How long were the cable runs?
What specific channels did you receive (real channel + call sign)?
Are you trying it with one uninterrupted cable length direct to one tv for initial testing?