I'm surprised the article didn't mention one of the most popular names for the "Seven Sisters," Subaru, the Japanese name and vehicle manufacturer whose logo contains six of the stars.
Subaru does not translate to "seven sisters" (or even six sisters) so bringing up Subaru would undermine the claim of the article
So even if we're being very literal, "the one with the two stars at the same time" is an accurate description of both the hidden sister story and the cluster.