Wow! Something major has gone wrong there! I’ve never seen anything like that before.
It could possibly be a bad import of the demo content. Or it could possibly, more likely, be an incomplete or corrupted installation of the theme. If you have additional plugins activated other than those that come with the theme, it could even possibly be caused by a plugin conflict.
I recommend you begin again. Use a plugin such as WordPress Reset (https://wordpress.org/plugins/wordpress-reset/) to purge the demo content from your database. Then delete the Moxie theme and reinstall it.
I recommend that you download the latest version of the Moxie theme again from ThemeForest (the “Installable WordPress file only” option). It is important that you download the theme again from ThemeForest because it has been known for zip files to become corrupted in transmission.
Then make sure that all plugins are deactivated (important!) and install Moxie again via WordPress: Appearance > Themes > Add New > Upload Theme.
Let me know how you get on.