The program itself was quite bottom-line. XANA, like most fictional villains, does not pay attention to minor details in his schemes, and therefore problems with the people inside the simulation did occur. For example, Sissi wore the wrong color shirt (though she claimed that yellow was the "in color"), and many of the people, including Sissi, Herb, Nicholas, Mrs. Hertz and other teachers, and Yumi's parents repeat their actions whilst mantaining their personalities.