It's the appropriate time to be worried. If I did everything correctly I would have no cause to be worried? In any case nobody has yet provided a definite answer to my question so if you are able to then feel free?
It seems like it will work out as you wrote, at least both you and the school administrator are in agreement. Tickets are booked and hopefully it'll work out. Thanks a lot for your kind assistance!
Yeah, what you're saying makes perfect sense. It's only a single entry and there obviously would be no need for a re-entry permit if I'm leaving the country. I'm starting to think the office-girls here don't have a clue at all. I'm guessing that I'm administratively studying two separate courses, the first of which has a duration of 9 months after which I'll have to start over again with a new visa application for a further 6 months. I won't bother you with any more questions until I've been able to kick this up to a Westerner at the office. Thanks a lot for your help so far.