Period showing up on the top of every chapter page

This is strange, and I hope someone can help. After I convert my file from mobi to epub, both files show up with a dot on the top of each page of the front matter and chapter. Just noticed it this morning, and I can't figure out how this is happening. Does anyone have a clue as to what I'm doing wrong?

Here's a link to my book. In the "look inside" feature, you'll see what I'm talking about.

Hoping someone has an answer for me because I'm stuck with this one. Thanks.

Note: I'm not getting any error messages.

Eleni