Hmm, that could be a possibility. Although TEMPIN2 only maxed at 44c while the cores maxed at 53c. And TEMPIN0 maxed at 61c. These were temps while running battlefield 3. So are the cores being hotter than TEMPIN2 normal?
That's also another possibility, looking around on the web, there's so many things about the HWMonitor TEMPIN readings that I'm starting to get confused myself
You should worry more about your Core Temps, I've done this for a long while along with many other people and they haven't encountered any issues.
From what you've said, you may be aright about TEMPIN0 being your CPU temperature, however, I believe this may be your your Package/Socket temperature, NOT your cores.