Hi Al -
I'm not familiar with what the skin might be displaying so although this sounds like a 'lifetime' total, is it likely the "My Day Starts At" on the "Settings" button could be causing the discrepancy? You haven't aliased another screen name to this one or have a filter set (click the "Clear" and "Refresh" buttons)?
If not see this for opening a support ticket so we can take a look:
http://www.pokertracker.com/forums/viewforum.php?f=45Export all your hands for this skin and attach them to the ticket. A screenshot or two of where you're seeing the discrepancy might help as well (both of those are referenced in the above link I included).
Mike