I am not sure what is the workflow to see the changes in history. Here is what I did:
created a new post.
select all files in Git tab.
Click History. I saw this post in History.
made a change (say ###) to the newly created post, saved it. I saw the change in History.
deleted ###, and added a new word to the post, saved it. I only saw the initial post in pink, and the second change in History, I did not see the first change.
I would expect to see the track records of each change.