A clan or family should really have only one chief of the name, and it is only the chief's arms that should be borne in the strap and buckle clansman's badge.

Because of the geographically-divided nature of the MacQueens, though, there is a possibility that the MacQueens on Skye and the MacQueens in "greater Scotland" may have had separate chiefs at one time. If this is the case, though, I'm unfamiliar with the crest used by the island MacQueens.

Very interesting question; hopefully somebody with more information than me can answer it.