It's definitely the right address, in fact I've used this deposit address before because SD keeps the same address for your account. I suppose it's possible my computer is compromised, but unlikely, and reading the posts above makes me doubtful. Wish I'd checked this forum before depositing, but never had problems with SD before ! Oh well !

I suppose it could have been transferred to an address that SD controls (wishful thinking !!!??!) I'll send SD an email tomorrow and see what they know.