Hello, @Cr3atorf1lm,
1. I have checked your site now and found that there is no issue. When i add a product to the cart while at the product category page not to redirect on the product page but leaves me at the current product category page. I have recorded a video for you on your site. Please watch it complete video for a better reference here: https://www.veed.io/view/a1a9ebdc-e885-472e-b359-298bf36aaf8b?sharingWidget=true&panel=share
2. Unfortunately, there is no such option in the theme. you can use any third-party plugin but at your own risk which better meets your requirements.
Thanks for your understanding.
Regards 8Themes Team.