Williams' Washboard Band

Jazz group, led by Clarence Williams, mostly credited as Clarence Williams and his Washboard Band. Since not a single record of the many released between 1927 & 1937 by Clarence Williams' Washboard Band was credited as Williams' Washboard Band why is the PAN Williams' Washboard Band being used? The Williams' Washboard band recordings made for Victor & Bluebird in 1933 are by a group related to the Washboard Rhythm Kings and nothing to do with Clarence Williams. At present records by the jazz group that recorded a session for Victor/Bluebird in 1933 the PAN Williams' Washboard Band (2) is used but this group should be just Williams' Washboard Band since Clarence Williams is not involved in the 1933 recordings in any way.