What Does the TV Show Lost Have Against Foothill High?

I've only visited Foothill High in SanTana (but shush, don't say what city it's located in!) once, and I can't even remember the occasion. But I'm thinking of them right now, after another night of one of my favorite current television shows, Lost. One of its main protagonists, John Locke, grew up in Orange County. In the scene below, young Locke is seen getting stuffed in a locker during high school.

Notice anything weird?The high school in question is Cowin Heights High, and their mascot is the Knights. Foothill High is near Cowan Heights, and its mascot is the Knights. Why did Lost producers change the name and school colors of Foothill High, and what's with the misspelling of Cowan?