Cannot modify existent Featurettes

HTML code for new and empty featurettes:

<div class="row featurette">
<div class="image col-md-5 col-md-push-7" data-align="right"><img alt="" class="featurette-image img-responsive" src="http://placehold.it/500x500" /></div>

<div class="message col-md-7 col-md-pull-5">
<h2 class="featurette-heading">First featurette heading. <span class="text-muted">It'll blow your mind.</span></h2>

<p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
</div>
</div>

HTML code after save node and edit:

<div class="row featurette">
<div class="image col-md-5" data-align="left"><img alt="" class="featurette-image img-responsive" src="http://placehold.it/500x500" /></div>

<div class="message col-md-7">
<h2>First featurette heading. It'll blow your mind.</h2>

<p>Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
</div>
</div>

Yes, right align changes to left, on left aligned featurettes it doesn't change, but heading nor content is not editable in any case.