Adding footer content to every page

Hi,
Two main problems I get with this plugin:
1) Every text I enter, I get it double (look here: http://johnny1.onlinerevenuesecrets.com).
2) I can't put code there, nor shortcodes. Is there a way to do it?
I want to add a code to every page, or to add some PHP code to the header of every page on the network would be the best...
Thanks,
Yonatan