This is probably due to Hanlin's ADE not following hyperlinks in ePub. The 1st level TOC is an ePub TOC, but the 2nd level is just hyperlinks on a standard page. I think 2-level ePub TOCs are possible, and would be handled by Hanlin's ADE ePub, but the lack of hyperlink capability is a serious oversight in the ADE port and I am surprised that Adobe "certified" the Hanlin port.
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