I don't like how high they are either.  Two solid wins against a decent South Carolina team and solid win over a Missouri team that isn't terrible.  Honestly thought there was some upset special in play for them so color me impressed.
This feels like a little too high after last year was just ok, but I think Mizzou is at least a middle-of-the-road team and the Vols just killed them. Tennessee is managing to stand out in a field of teams with similar profiles.