I just noticed my username as displayed within Toodledo and its forums changed from "thegriff" to "thegriff_2". I'm wondering why this might have happened. I'm also noticing it for some others in the forums.
If you attempt to edit your Alias or Avatar, Toodledo will enforce uniqueness. You must have recently edited your avatar or alias and then Toodledo realized that someone else has a name of "thegriff" and added the 2 onto the end of yours to make it unique. We started enforcing uniqueness about 3 years ago, so you (and the other griff) must not have edited your Alias/Avatar for that long.
If you create a support ticket we can look into getting your name back, since you've had it for a very long time. The other griff may not be using it.