3.9 and visual editing issues

I’ve tried a FEW visual editors (such as tinymce advanced) and when editing a page or post since upgrading to 3.9 HTML TABLES are broken, with data being moved out of the table and “</td></tr></table> moving to another part of the page.

As such, I can no longer edit my pages/posts without them getting corrupted.

http://www.pianowizardacademy.com/buy-piano-wizard-academy

Looks like THIS in the editor

http://www.pianowizardacademy.com/editor.png

If I save the edit, then the page will look like the screenshot. I had to restore a previous revision to get the page back.

I’ve seen a couple of topics with people experiencing issues with html editor, but they were closed with no solutions.