I've used BW for over a year now. The inability to detect forms is a common problem, with long standing open bugs being documented elsewhere in this post.

I distinctly remember, the very first new login I created after moving over to BW. Nothing happened and I just assumed BW was simply not that chatty about such things. BW fails to detect a significant number of signups for me. It's not a rare occurrence. I've had to train myself to create the login explicitly, rather than hope for auto detection.

1PW has taken a wrong direction, so I "suffer" with BW. However I don't recommend it to anyone. (no one asks, so it's not much of a concern)