Oh, that is unusual. When i checked the admin page for your account, it actually does say you’re only at trust level 2. You shouldn’t have the Regular title, and as you said, you don’t have any option on your preferences page to change it. It’s entirely possible that this is simply a bug in the system, in which case only an update to the Discourse software might reset it.
But just in case it is fixable by some simpler measures, @EclecticEccentric do you mind if we take this to PMs?