As the person who Russell was discussing this with at USCHO, I can fill in some information.
USCHO's owner Tim Brule is the main developer for stats and rankings. He worked over the weekend with the NCAA's consultant on the RPI and Pairwise to get it correct. The issue was with stats coming from Genius (the NCAA stats supplier) and the NCAA itself, especially dealing with which teams were home or visitor or if a game is at a neutral site. Strangely enough Genius doesn't list home and visitor but team1 and team2 and those are sometimes are not entered correctly and we have to go in and fix them.
According to Tim, 90% of the work USCHO does fixing stats each season is from D-III because of errors with box scores. Many schools/leagues have not updated to the new NCAA software, so they are still using the old StatCrew which has to be converted to the new system after the game. Games from those schools can't be displayed as live scores because there's no live data. (And not as some say because USCHO doesn't care. If USCHO didn't care, Tim wouldn't spend hours each week fixing the mess.) We understand many schools have limited resources.
All that said, USCHO spent many hours over the weekend to get our PWR to match the NCAA's official data which the NCAA's consultant had spent hours correcting for tournament selection.
When collegehockeystats.net was in business, we had a correct feed from them and received notices when things needed to be fixed. USCHO can't force schools to update their software and we get whatever Genius sends us.
Thank you