New Pages Created Are Interlinked to Another Page

Hi all!

This is the first time I've been using Squarespace and I ran into a problem that I cannot seem to fix. 

Every new page I create copies a certain section of another page. When I delete said section on the new page, the contents are also deleted from the original page. 

Is there a setting causing this issue?

Thanks in advance!

This sounds like a very strange event, can you screen-record this happening? You'll probably want to report this to Squarespace Support directly as well as asking here.