The first problem is indeed that your WordPress theme (and I am 99% sure it is the theme) IS loading a non-standard version of the jQuery Javascript library from the google CDN. Why they do this is beyond me when it can cause so many problems for well-behaved plugins that adhere to WordPress standards and the WP API.
To make it worse it is also loading a version that will disallow users of IE version 8 and below to make use of your site. Bear in mind that while these may not be great browsers there are still a large number of people using them!
There may – or may not – be another issue lurking underneath but this one is enough to cause the errors and should be fixed up first.
Personally, I would be asking the theme authors to correct this as they really should conform to standards,. If this is not possible then it is usually easy to fix but it does mean editing code and that code has to be found.
Assuming, of course, that there is not an option within the Wp theme custom settings to NOT load the library from Google. Some have done that bless them!