Keith nailed it.. this happened to me late one night recently. I was ready to rip my hair out because I thought alt + double-click wasn't working then I realized that the token wasn't linked to the character sheet. So, if you shift + double-click or alt + double-click and all it does is open token settings, immediately look at who it says that token is assigned to, It's likely nobody. Also, if you end up going plus to gain the functionality your talking about, TokenNameNumber already does exactly what you're looking to do.