[78-L] Dalhart with Floyd Collins in two places

[Jim Whipkey]

How common is it to find  the same song, by the same artist on two different labels?  I've just come across  Vernon Dalhart singing "The Death of Floyd Collins". one of the records is  a Perfect label with "Many, many years ago on the B side and the other is a Conquerer label,  with Dalhart singing "A Boys best friend" on the B side. Would assume  both of these records were cut at approximately same time, since it would seem logical to me there  was a  pretty short popularity period for the Collins song.  Any additional  info on this  appreciated.
Jim Whipkey