Interlined-routes, a bus that enters downtown as one route and leaves as another, are a recurring issue with the data from King County Metro. The symptoms occur when you are looking at your stop on OneBusAway, not seeing the route you care about but instead seeing a bunch of routes that don't seem to actually serve the stop. The latest schedule update was no exception, and I'd say 90% of your bug reports have been about that issue.
I'm happy to say that I've hopefully fixed the latest batch of schedule data. It took a bit longer than usual, but hopefully it will make OneBusAway work better for a lot of you.