Font in body of T1 About this Site

Good day,
I have several plug-ins working fine in my footer but I am having problems with the T1 About this Site.

The header text is fine, right font (Voltaire), right color but the body text is not displaying properly. Instead of showing the prescribed body font (Open Sans) it is repeating the header font (Voltaire).

I have very limited programming skills but I am not afraid to learn. How can I correct this problem?

Thank you in advance for any help.

Barleybits