About the clean notes into the message body, can you try ‘Settings’ on my signature?
UseAlternateRtfSyncing value under [MailScanner] section:

Another mechanism for inserting notes into the body of emails in Microsoft Outlook. RtfSyncing is concerned with Rich Text Format. In emails, the user typically save both Rich text (HTML) and plain form of message. When you modify one type of message, RTFSync is the right function to synchronize text of message to the second form. Disable = 0.

See screenshot of settings here: http://forum.avast.com/index.php?board=2;action=display;threadid=9514