Unit Section flip from Clear Text to Code

Unit Section flip from Clear Text to Code
ie. Will create a Unit Section as:
During 2013, the real estate industry spent a whopping $27.3 billion on advertising, with more than half of that going to digital media.
That’s a lot of money.

And when I save or view it switches to code and I lose all formatting.
ie:
<p>During 2013, the real estate industry spent a whopping $27.3 billion on advertising, with more than half of that going to digital media.</p><p>That’s a lot of money.</p><p>