Why does position of p tag determine if edit frame will let me edit text in page editor

Ok so if I do this page editor will NOT let me edit the field:

<sc:EditFrame ID="contentEditFrame" runat="server"><p><sc:Text ID="content" runat="server" Field="Document_Content"></sc:Text></p></sc:EditFrame>

If I do this it works:

<p><sc:EditFrame ID="contentEditFrame" runat="server"><sc:Text ID="content" runat="server" Field="Document_Content"></sc:Text></sc:EditFrame></p>

curve ball, this works: 

        <sc:EditFrame ID="titleEditFrame" runat="server"><h1><sc:Text ID="title" runat="server" Field="Document_Title"></sc:Text></h1></sc:EditFrame><br />

so page editor why does the position of a p tag within editframe matter but not the h1 tag?

Can anyone explain?  At least now if your page editor does not work you can check this scenario.

If you have anything you would like to share with the guild please email me at chris.williams@readwatchcreate.com​