Plugin not working properly for me.

Hi,

I installed the plugin but its not working as it should.
The “adding to cart” state lasts forever, and i have to refresh the page so that the button resumes its original state. Also after that quantities disappear so they are no longer editable.

I basically want customers to able to add any number of items to cart and be able to continue doing so without moving away. So ideally i would have an option to contiue adding and a checkout button next to it if costumer wants to move for immediate payment.

Also as you can see on my website i have both services and products i would like to have services being able to define quantities and products that each client should only be allowed to buy one at a time.

Could you please help me?
please check here: http://voodoomastering.com/pricing/

Kind regards,
Andre

https://wordpress.org/plugins/easy-digital-downloads-keep-add-to-cart/