Sometimes mis-attribution is down to laziness, or lack of research - I remember years ago the BBC did a programme on connections between Irish and American music;   it featured Emmylou Harris, Mary Black and Dolores Keane singing "Grey Funnel Line" without commenting at all as to its source or subject (the unmistakeably English Cyril Tawney and the Royal Navy).   

From my own point of view I am proud that one of my songs is included in the Yorkshire Garland's Industrial and Mining Songs - and it is entirely appropriate that it locates to Yorkshire, sung by a true Yorkshireman (and mudcatter - Ray Padgett) rather than my own West Country.