Editor is re-arranging html elements automatically

Hi,

my plugin is inserting an html snippet (editor.insertHtml() ) like:

<div> <a...> <div> <img> <span>...</span>...<span>...</span>.. </div> </a> </div>

but i see that after insertion, the editor is converting above into:

<div> <div> <a...> <img> <span>...</span>...<span>...</span>.. </a> </div> </div>

Notice the re-arrangment of divs around anchor.

How to stop this behavior or tell editor not to re-arrange elements.

I understand it may be desired in some cases like when user tries to put a non-valid html source etc, but from a plugin?

Not sure what wrong the editor sees with the first one, since its working good in browser?

Thanks for your help.