"Bed Type" doesn't mean it's uniformly that type, it's sort of the max of the class, so it's not terribly useful. It would be nice if it was broken down by number of beds (it is on some sites), but that's more of a nice to have than the norm.
That field is mostly useful for distinguishing between whether you're getting a couch or a bed in the case that you're just renting part of the apartment. It's not very useful in the event that you're renting a whole apartment. It means there's at least one real bed, it doesn't mean that everyone in the "Accommodates" number will get a real bed.
It's not perfect, it would be better if it were more explicit, but this is a pretty common on these sorts of listings.