As the release notes for Mint 14.1 state: if you have started with Mint 14 and installed all available updates then your system will have the same state as 14.1.
I do not know whether the Mint makers have bothered to update the displayed version strings, but it is worth a try. Launch a terminal session and execute
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Corrected the spelling of lsb_release, with an underscore, not a dash.