CKEditor ordered list messed up (re-ordered) when deleting an existing bullet

[Setu Poddar]

Steps to replicate:
copy below snippet in 'source' mode

<p>Heading:</p> 
 <ol> 
    <li> 
	<ul>
	<li>List 1 Item 1</li>
	<li>List 1 Item 2</li>
	</ul> 
	<div>&nbsp;Sub heading</div>
	<ul>
	<li>List 2 Item 1</li>
	<li>List 2 Item 2</li>
	</ul> 
    </li> 
</ol> 

Repeat the steps below with Firefox, Chrome and IE8:

1. 1st scenario: Select the complete "List 1 Item 1" bullet line and then delete it.
   It works fine with Firefox and Chrome browser, the order of the list get mess up(re-ordered) with IE8 browser.

2. 2nd scenario: Now place the cursor at the very beginning of the "List 1 Item 1" bullet line and then backspace delete
   All Firefox/Chrome/IE8 browsers has this issue where the order of the list get mess up(re-ordered).

[Jakub Ś]

1. First scenario: I have tried this issue in native contenteditable element in Ie8 and got same result. It seems that this is some IE8 bug as it doesn't need editor to create such result. I don't think we will be able to fix this problem but perhaps someone else from the team will think otherwise.

2. Second Scenario: Good catch. Problem can be reproduced CKEditor 3.6.3 rev.[7397] which is a fix for regression introduced in #8632.