When I get time this weekend I'm going to delete my unsent invoices entirely and rewrite them again from scratch, which I know is going to mess with my VAT accounts because they were raised in the last quarter, but I have no other option.  It might work, but it's a mess.  I don't know what has been received and what hasn't.  One invoice that is apparently unsent has actually been paid, so I don't even know what the actual status is.  Are some being sent?

This needs to be fixed immediately.  We are trying to run businesses here.