Woocommerce Shop Page Issue

Hi,

My shop page is having some issue: it is not displaying correctly according to setup. Any changes to the setup is not affecting it as well. Namely, I am always seeing one same shop page.

I do see a woocommerce folder on my theme folder. Would correcting some of these files help resolve the issue? How about database tables/rows that need to be deleted?

What is causing this shop page trouble? Ps I do find out if I create a new shop page (name it shop1 e.g.)without specifying it as the shop base page in woocommerce settings, the page would display right.

Thanks for your help ~