Lean Enterprise Epub and PDF are out of sync. That is, PDF is release "2015-10-30 Sixth Release" but the Epub has release "2015-02-13 Third Release".
I had downloaded the Sixth Release before but the current version online is the Third Release.
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You are correct; the EPUB file available for sale was indeed out of sync with the PDF, and was an older version of the content. We've corrected the problem and loaded an up-to-date EPUB. If you redownload the EPUB from your Your Products page, you should now get the latest version of the EPUB.
Our apologies for the error here. Let us know if you encounter any further issues.