If I enter the following html in source mode, click back to design mode, then click back to design mode the html gets converted.
Original
<p><span class="one">first span class one</span><span>second span with no class</span></p>
Gets converted to
<p><span class="one">first span class </span><span class="one">one</span><span>second</span><span> span with no class</span></p>
Why are these extra span's being inserted?
I have config.allowedContent = true; to prevent ckeditor messing with the html (but it obviously still is). I am using the .net control with ckeditor ver 4.3.2
Interestingly if I enter the following bit of HTML (which is essentially the same structure) ckeditor doesn't mess with it.
<div><h2>first span class one</h2><p>second span with no class</p></div>