Edward,
The Safari API is very limited for Rich Text Editing. You may experience some difficulties. We are trying o do our best to make it work better. Welcome any feedbacks.
Please try the following example:
>>One of the problem is the doubling up of the written text, and the other is that the entire area of the control is selected instead of only sections of text.
Please check this example:
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx