Hello,
I have seen the video attachment as you pagination did not work and shown the same results every time. But when I test your site the pagination it works perfectly fine. You can check the below video for clarification: https://jmp.sh/SKO5FGm
Kindly clear your browser cache and check again.
The other two pages which you share with us did not shown alright. In the grid the product names shown multiple times. It seems your site cache or third party plugins conflicts.
Kindly deactivate your third party plugins and then check that grid. Also i noticed that you have CDN(Cloudfare) try to check your site after flushing your server CDN cache as well.
Screenshot: https://jmp.sh/N7rvhOj
Best Regards.
.
