Remove/change "Page Title here" & "page description here"

Hi - For some reason, when I open one specific blog post, at the top of the page it says "Page Title here" and "page description here". I can't for the life of me figure out where to go to change that. When I open any other blog post, it shows the blog title at the top, as I've created it in settings. I don't know why just this one post shows up this way. Clues? I'll include the url of this post as it displays when selected.