Incorrect work of bb-codes

Bug #1 Duplicating text when using list and url bb-codes
Steps to reproduce
1. Open anwer form, fill message content with sometext
2. Select text, apply "List" bb-code

[list]
[*]sometext
[/list]

3. Select all text (with "List "bb-code) and press button "URL", fill link field with valid data

Actual result
Duplicating text:

[list]
[*]sometext
[/list][url=http://ya.ru][list][*]sometext[/list][/url]

Expected result

[url=http://ya.ru][list][*]sometext[/list][/url]

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Bug #2 incorrect handling combination of some bb-codes with url

Steps to reproduce
1. Fill message field with some text and apply one of bb-code (highlight, align, list or margin)
2. Apply URL bb-code

Actual result
Only URL bb-code is applyed

Expected result
All bb-codes should be handled