Magento Theme - Show more / Sliders does not work correctly on homepage, JavaScript does not work, product adding to cart does not work, styles is broken

Go to System => Configuration => Advanced => Developer in Magento Admin Panel and check that you does not enabled Merge Javascript and Merge CSS files options. Never enable this options in Magento, this will give you a lot of issues in Themes and Plugins.

After this clear/refresh Magento cache.