For that matter, the site says under "Our Diocese" that "The Diocese of the West includes parishes and missions from Alaska to the Mexican border, including Montana and Arizona." However, the ACA-DOW has belatedly acknowledged that there are no missions in Alaska, so that statement is out of date as well. (The Montana mission, though, is still as iffy as ever.)
I leave it to visitors to speculate on the reasons for this nonfeasance.