Different shopify templates still identical

I’ve been trying to create different pages across my Shopify page but all of them end up looking identical, with changes to one page affecting all the other ones as well. I’m aware that I have to have different page templates, and I believe I’ve followed the correct process of creating them (Go to edit code of main theme → Make new .json template with a unique name → set a page to a unique template in the pages section of the online store) and I’ve confirmed that each of the pages is set to a different template. However, despite this the pages still seem to be on the same template since I’m have the aforementioned problem. All of the templates were created as copies of the default page template, if that helps at all.

@Francis_Yang - are the sections which used in these templates are different? can that be an issue?