Why does adding an anchor element in the workspace change the way the program auto indents and auto codes closing tags?

After I add the

<a href="index.html>

anchor element and close it with

</a>

in the workshop, hitting enter to write a new line of code no longer auto indents lines of code. Also the workshop is designed to auto close tags. Example: when I type <h1>, the system automatically adds the closing tag </h1> so I don't have to. Since I have added the

<a href="index.html> </a> 

anchor element to my document, it automatically adds </a> after I start a new tag. For instance, now when I type <h1>, instead of auto coding the closing tag with </h1> to show

<h1></h1>

it looks like this instead.

<h1></a>

MODERATOR EDIT Formatted code/question for optimal viewing in the community forum.