I wasn’t so sure at first and was just wondering why I got so many hits for things that didn’t belong there, but now I’m pretty sure it’s a bug (5.3 preview 0214, but noticed in previous versions as well).
Searching for Channel, among correct ones, gives all these results on top:
The guys went off to refine the search algorithm.
It seems to me that as help patches grow, the browser will need to be rethought. I really miss being able to enable only one package in search. But I pray that with the new search half of the problems will go away.