Pasting into CKEditor creates divs instead of paragraphs
I believe this problem is unique to the Chrome browser, i.e. when pasting text directly into the WYSIWYG you get divs instead of paragraphs. In Firefox, for instance, you get paragraphs instead.

One workaround is to use the "Paste as plain text" or "Paste from Word" buttons. This should give you paragraphs instead of div tags.

You could also click the "Source" button and paste the text, then when clicking "Source" again the text should be converted into HTML with paragraphs.