well … it’s apparent that the translator on 105.5 W288CX, 250 watts at 500 feet is rebroadcasting WXBT HD-2. The ratings don’t come from the HD, but from the translator. Nothing surprising about that. Typically Nielsen combines AM/HD-x/Translator into whichever station the subscriber requests, but usually HD over translator.
As a sidenote, Nielsen does not report translators (simply because it can’t report the unique call letters of translators). Any translator repeating an HD2 would result in the HD2 being reported in the data.
I just rechecked Radio Online and StationRatings.com, and both still don’t have the main WXBT. (I don’t have an account at All Access.) Since the problem appears to be on multiple sites, reporting the omission to the sites might not work–as the issue would involve the raw data/results that are provided by Nielsen to the sites.
Beyond that, I don’t think that WXBT was delisted, as those decisions tend to be publicly announced. And, while it’s theoretically possible that iHeart doesn’t subscribe to that specific station’s ratings any longer, it’d also be very much unlikely. I really do still think that this is the result of a mix-up at Nielsen and/or iHeart.