I'm no longer in community radio(not by choice but by a gross injustice committed against me by the station's committee) but LPs like these have, in spite of themselves, become staple fare for community stations operating on tight budgets. Albums like this are often donated to the station, some volunteer presenter may offer to transfer them to CD or MP3 files for a computer playback system. That's where composer credit details come into play. Depending on policies or reporting requirements, community broadcasters may well need to note the composer of a song or musical piece(instrumental), and if these LPs don't have such detail, problems will likely arise. Record companies really have no legitimate excuse for leaving such detail off their labels, no matter how big or small the company is, no matter whether the album is budget- or full-priced.
Re: the composer credit, that's a failing of a majority of the "budget" compilations on any label. The rational seems to be that no broadcast station should be using those albums anyway, so it doesn't matter. (Not that it makes a difference, just don't use them during the week you have to keep the royalties log)
Wasn't there another song also called bewitched (and I mean a standard, not the TV theme)?