Mr Price - unreasonable security policy

Mr Price Vaal Mall has a security policy that only allows two students into the store at any given time. I (adult supervision) took a group of six students to get matching shirts for an upcoming school event. I was delayed at another store with one student, and opted to send the other students ahead to chose their shirts. I get to the store only to find three students unable to enter. Mr Khotso (security) only allowed the students into the store when I intervened. He could not provide me with any reasonable explanation to this rule except to tell me that he is enforcing what he was told. Why are there no signs posted so that we (and student customers) are aware of the security policy of this store? Are student’s cash any different from that of regular customers? How do you expect the group to buy matching shirts if three students are not allowed into the store. We purchased six matching shirts on this occasion, but I would be hard pressed to recommend this store to any other students.