Title of Custom post page won't change

Hello, everyone. I made a custom post page and have synced my sandbox to live, and everything worked until I moved to another post and found out that it didn't! I followed the instructions, here: https://www.wix.com/corvid/forum/community-discussion/custom-blog-page-using-corvid-help

but my title and author's name still won't change even though I've written different authors into my sandbox. I've added a backend code that was from the link above, and the original page code from the example, and changed my ID's, but it still won't work.

Can somebody help me out?