Yes, the buses come as often, but the routes move around a lot. Note the disclaimers (usually, often, sometimes, we think) in the following statements.
During busy seasons often and often first thing in the morning or at closing during moderate seasons, the BW usually shares buses with the Swan Dolphin and the Y&BC get their own route. That makes three stops on the BW route and two on the Y&BC route.
During slow seasons and often the rest of the day during moderate seasons, all five stops are combined. So a single bus will service Y&BC, Swan/Dolphin, and BWVs.
If you grabbed a stop during a time they were switching routes, it could have been confusing.
We haven't had great luck with BW buses from the AK in particular - and more than once have taken either an MGM bus or an Epcot bus to get "close enough to walk home." In reality, this saves no time - the walking eats up any waiting time we would have done. But the kids gripe less than they do waiting for a bus and I'd prefer to be in motion. We've also been known to grab a cab. We've had better luck with buses to and from the MK. But I'm convinced bus luck is a relative thing - we had one trip where we ALWAYS waited, ALWAYS stood and the bus service was horrible. The very next trip, the bus always appeared magically when it was needed with plenty of seats and it was "I don't know why anyone would need a car here, this is perfect."