Tagfucked up HTML

So, I run a website for a great group of people. It is a non-profit that rescues greyhounds. Sometimes, they need to post something, so I get a file in Microsoft Word, and I need to get it HTML formatted. Their website is based around Joomla, and I use the JCE rich text editor. In general, it works pretty good, but sometimes it is thrown for a loop by what Microsoft outputs as HTML. An example:...