As you mentioned, there are numerous CRC algorithms, and people apply them incorrectly all the time. Without knowledge of the specific application, someone could have used what they called CRC-5 USB on byte data, but never implemented it correctly. I have seen so many incorrect implementations of CRC's, it is a frustrating thing to see, especially if the customer gives no examples of it. As long as the mistake is mad eon both ends, it doesn't really matter, right?
I suspect you are correct that since my code is designed for message data, it operates on bytes. The USB CRC is very specific to one 11-bit value. I can get some of the examples you provided to match by tweaking settings, and get others to match tweaking others, but couldn't find one solution that covered them all. Again, I think it is because I am operating on 8-bit data sets. Even if I changed the code to work on 16-bit data sets, I could not find a solution.
