There are several references I saw that that stated "Maggie Mead by JP Fraley"
Here's one: http://www.mne.psu.edu/lamancusa/tunes.html

You may certainly be correct that their intention could have been "recorded by".

It's best to change the editor's default "Unknown Composer" to "Traditional" if you believe that to be the case.
As you know, there are different versions of many songs. Sometimes, different songs share the same (or similar) title. When possible, it's helpful to credit the source of your version.
(book title, recording artist or collection etc.)

Every effort to pass along the "story" of the music in addition to just the songs is appreciated.
)BOB