Hello, @LambdaSP,
1. I have checked your site now and the sidebar is no more on the Shop page, so it seems you have disabled it: https://postimg.cc/jDwdrSKk
2. Sound’s Good!!
3. A. Your issue has been solved please check back to your site now after removing the browser cache, I have added the Custom CSS to fix your issue.
https://postimg.cc/SncyvZ4n
3. B. Your issue has been solved please check back to your site now after removing the browser cache, I have added the Custom CSS to fix your issue.
https://postimg.cc/k2gcjHKc
3. C. What actually and how you want to style that button? Could you please explain with somescreenshot.
https://postimg.cc/qNqFtqb4
Regards 8Themes Team.
