Howdy!
Could you please try temporarily deactivating WooCommerce, and then check to see if the issue persists?
You can also try to deactivate all plugins on your site, and see if that resolves the issue. If it does, then activate them one at a time to determine which is causing the conflict.
If that doesn't help, please rule out a theme conflict by temporarily changing your site's theme to a default theme (such as Twenty Twelve) and trying again.
Let me know how that works for you, and we'll go from there!