Other mistake: In the original version, a portrait of Bryce's family can be seen. Not only are the actors playing his parents completely different from the later episodes (which isn't necessarily an error, because actors for characters change in shows all the time), but Bryce is also shown to have a sister in the portrait. In later episodes, it is established that Bryce is an only child, so he doesn't have a sister. The portrait of his family is altered on the current streaming version on Netflix to show the new actors for Bryce's parents and remove the sister, but the DVD still has the original version.
Other mistake: In the hall during the Spring Fling Dance, Bryce reminds Justin of the night before Freshman Year when they stayed up all night talking about being kings of the school. This doesn't make sense considering Justin is then a Junior while Bryce is a Senior. Bryce does however end up in the same year as Justin when he transfer to Hillcrest for Spring Semester and goes in as a Junior. (00:52:48)