Heading Shifted
I'm struggling to return the first chapter link to its original position on the page after the TOC of the epub version. It somehow shifted from it's original position on the page after the TOC to just below the TOC. I have no idea how I caused this error, nor any clue how to rectify it. This is how it looked before:

This is what it looks like now:


Any ideas what I did wrong and the easiest way to correct it?
