Hello,
Thank you for choosing our theme and contacting us.
1 & 3 & 5. We don’t guarantee that our theme will work with this additional plugin. And you see that it doesn’t work you need to ask plugins developers for help. Also, we suggest you use our own inbuilt filters for products attributes. Here is a video tutorial that should help you https://www.youtube.com/watch?v=gp3SMkKvUvs
2. This widget is a default WooCommerce one. You can disable it adding this snippet to the functions.php file in the child theme remove_action( 'woocommerce_before_shop_loop', 'woocommerce_catalog_ordering', 30 );
4. Be sure that you are running WooCommerce 2.6.11 since 2.6.12 has a bug with variations discussed here https://github.com/woocommerce/woocommerce/issues/12817
We suggest you keep 2.6.11 until the new version will be released.
5. You can edit your terms order in Products -> Attributes -> edit terms. Simply drag & drop their order there.
Kind Regards
XTemos Studio