When Sue became a level two sales manager, Vivian basically dumped the job of delivering to Julie on her, no matter how inconvenient it was for her. Sue eventually became fed up with it, and went off on Julie for being such a high maintenance customer. Julie was not actually even shown until season 2, when we learn exactly what she is wanting all those butter tubs for: storing her cats' poop. It is also revealed that she is a charter member of the Platinum Lid Club. She also shows signs of being a chronic hoarder with her cats, newspapers, and her previous orders of butter tubs.