Looks like the large font sizes (I saw 53pt in there at some point). Strings like "JaniceCustoms.com!" are stretching things out, since they can't be broken over multiple lines. When you have any instance of multiple words without spaces to them (like "word1/word") be sure to put spaces in ("word1 / word2"), since that helps prevent this.
A slightly better approach is to set a base font size for the document using CSS, and adjust relative sizes elsewhere. You may, for example, set the base font size to 12pt, then scale around by setting font sizes to 200%, 75%, etc... with CSS.