We have solved the mystery of the scheduled job issues!
The server hardware's time is set incorrectly, so the hosting company will be correcting this later when their is not so much load on the server. This does mean that they will have to take the server down for a few minutes to prevent issues and a white-list will automatically activate when it comes back up, I will try and turn it off as soon as possible!
Scheduled backups etc should then run without problems and at the correct times!
