Just encounter a really weird bug with adding a period after a link and I was able to reproduce it in the demo of your website.
If you create a simple link like this:
<p>Heading:<br />
<a href='http://www.google.com'>This is a link to Google</a></p>
Now in design view, add a period after the link, then look in the code view, the html now looks like this:
<p>Heading:<br />
This is a link to Google<a href='http://www.google.com'>This is a link to Google</a></p>
So when I add a period the text inside the link gets pasted into the front of the link somehow. If you now deleted the period in design view, you will now see the extra text that was added in by the editor.
Brian