Bad writing? Bad grammar?? Misinformation??? Or all three????

Quote from liner notes to 1991 Charly Records/Affinity Box Set CD AFS 1018-6 "Louis Armstrong and the Blues Singers 1924-1930"

[Perry] "Bradford, from Montgomery, Alabama, worked as musical director for Mamie Smith, and it was his Crazy Blues which launched the singer's recording career, resulted in a disc that sold in excess of a million copies, and was the first-ever recording by a black artist."

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Was the writer really trying to say:

[My words in brackets]

[Perry] "Bradford, from Montgomery, Alabama, worked as musical director for Mamie Smith, and it was his Crazy Blues which launched the singer's recording career, [resulting] in a disc that sold in excess of a million copies, and was the first-ever recording by a black artist [to do so]."

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In an earlier paragraph, which mentions the scarcity of information on May "Baby" Mack and Nolan Welsh, it seems the writer is pointing the obscurity finger at Billy Jones who is the featured vocalist on one track included in the set.

Columbia matrix 140819-2 Harmony 4-H "I Miss My Swiss" by The Southern Serenaders (Fletcher Henderson) with Billy Jones on vocal.

"Of Billy Jones, even keen research reveals nothing outside his one-number session."

Now I really don't have to explain that one....Do I???

Martin