Still, it's easy to imagine someone seeing it on the site, not knowing much about trademarks, and getting the wrong idea.

True enough, which is why we were very specific on the author info sheet that Baen foresightfully sends to its authors about what, exactly is the Registered Mark, which is: Liaden Universe®

Notice the R-inna-circle, which indicates the Mark is Registered; not a TM, which indicates that the Trade Mark is pending.

And! we can get in a Whole Buncha Trouble if we fail to mark the right thing with the right mark.