Some other app are changing the metatags of the post when edited on it. In this case, you loose the badge (and the autoamted 5% stronger upvote that only relies on the metatags). In contrast, if you edit your post on steemstem.io, we don't touch the metatags. This is just a choice (that we thing fair).
For the beneficiary bonus , this is for now manual so that one easily misses it. I wil ltry to automated it this week or the next one.