USCHO is just like any other news organization. They make decisions about what they're going to emphasize. Not everyone agrees with those decisions because they can't please everyone all the time. I don't always agree with their editorial decisions, either, but I also realize that the site isn't designed just to please me.
The USCHO management knows that Sioux fans account for a large percentage of visits to their Web site. The idea that USCHO goes out of its way to snub UND is, therefore, quite ridiculous. They're smart enough to not bite the hand that feeds them.