Dom,
Your site’s fine–leave it alone! 
Also, I’ve also been meaning to ask you: You have people (independent contractors) who do a very good job for you and it sounds as if you treat them very well. But WHY would these people who are skilled at SEO want to do this work for you, when they could build their own websites and keep all of the commissions they earn, themselves?
Just something I have always been curious about, not just from you but from others who hire contractors or who employ staff to develop and update their sites.
Thanks!