outlook has nothing in draft , owa has 55 mail in draft

We use Exchange 2010 , 30 client PCs and Laptops .

I found on my outlook , nothing on draft (expected) , as everything has been sent .

I don't normally save to draft , always edit and send quickly .

I do not normally use OWA .

Recently , I tried OWA , and found that my mailbox has 55 mail in draft .

All of this email has definitely been sent via outlook .

No one else has reported this error .

I have created new outlook mail profile with cache . nothing in draft .

I have tried outlook without cache , nothing in draft .

OWA has 55 mail in draft .

Please advise.

I need to get this fixed before any one else reports this issue .

Thanks

David Ng