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1. You should not need nor use a pre-amp. Eliminate it completely as it is far more likely to create new issues than to solve any unless there are undisclosed or undiscovered (yet) issues. Your signals are forecast to be "very strong" and the AP8700 is ill-suited for that environment.
2. WOIO operates two transmitters, one on VHF 10 and a low power channel 19 Akron translator. Do you know which signal you are getting?
3. The DB8 is a UHF-only design and does not receive the VHF channels well, especially as they drop in operating frequency. Both WOIO and WJW are VHF channels. The most reliable and predictable way to receive a VHF frequency is to use a VHF antenna. Using a UHF antenna to try and receive then produces results that are best described as "highly variable" (odd angles, low gain, etc).
4. What does the signal path look like? Is the antenna aimed point blank into your roof, your neighbor's house, a big tree, a forest, or a relatively clear area?
My recommendation is that the amp and its power inserter be completely eliminated and that you retest reception.
There are a significant number of FM stations in your general area, so the addition of an FM filter is suggested if reception problems with 8 & 10 (real channels) persist with the amp out of the circuit.
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