FCC maps show WHIO-DT with a local signal through all of Warren County, and the vast majority of Hamilton and Clermont. So either he's seeing something from WHIO, someone is within near his house with a transmitter drowning out WHIO's 1 million watt ERP, or someone is using a different channel and incorrectly ID'ing as using WHIO's physical channel.
Maybe WHIO is planning to do their own version of Channel 22.