Yeah, this happened to me once before and the nzone.exe creator cleared his server cache and it fixed it. It just happened again so I've contacted him (just now actually), and he says if it's on his end -- and not just Nintendo's -- he'll look at it again today.
...Are... is your Mii also called Dea Grimm? I could swear I've come across that same exact Mii name from Brazil in my plaza a few times recently. (Well, when homepass worked.)
Yup. DeaGrimm is my default NN pretty much everywhere.