win58 on "[Plugin: WooCommerce - excelling eCommerce] Cart % Discount Coupon not working"

I see you have a Themeforest theme and mixed in with a skeleton theme code.
The theme page is contradictory with the revisions specs.
You may want to check with them for current issues.
Ultimately, to put your concerns to rest, you may want to try downloading a free Wootheme optimized for woocommerce and see if that works with your setup.