BladeUK - I replied to your PM with the (hopefully) info you need to correct it.
horrordvds.com - Like I said before, it's based on unique members. In a way, you have to think of the logic behind it. Seeing that 20 different people bought/sold something from a person IMO is a little more comforting to know that one person bought/sold 20 things from a person. The Rating is just the score displayed in the thread view. On the user's trader rating page it displays the total amount of positive feedback received. If you feel the need to make it non-unique, you can easily edit the PHP script to do so, however I'm not planning on making any changes/options in my code.
therczone - Yes, I always knew about how it displayed that info incorrectly in the "who's online", and there are numerous posts on how to alieviate the issue for any custom file (like you posted). I might add an additional text file for people who want to make this change, however I see it as non-essential. If you notice, the rest of the hack doesn't require editing any vBulletin files (this was intentional) so that upgrading from one version to the next (for both vB & TR) would be quick and painless.