Why is the font in my new content different from the fonts in the rest of the site?

Pasting from Microsoft Word is usually the culprit when new fonts are introduced to your site. Word documents contain invisible excess markup that can introduce incorrect fonts, spacing or display issues. To avoid these issues, use either the Paste as Plain Text or Paste from Word tools available through the editor toolbar.

Paste as Plain Text
The Paste as Plain Text button will remove all formatting and markup from your document.
Paste from Word
The Paste from Word button helps to remove excessive Word markup but leaves some structural formatting such as paragraphs and bulleted lists intact.