I've worked in a position that would make your average school office assistant's head spin on their shoulders - that's great! Really. except there is no such thing as an 'average school office assistant'. We all do many, many jobs, all a the same time. you don't seem to respect the people who are in fact in* loco parentis (that means, in place of the parents for the duration* ) - and by extension, don't think much of parents either.
Ptumbi, I think that what you have described above, is exactly an average school office assistant. Multi tasking, while taking care over making as few clerical mistakes as possible is the main part of the job description.
And as for being the right kind of person for the job, well that would be the kind of person who cares about attention to detail while carrying out their many, quite regular daily tasks.
As for my job, of course I've made the odd mistake - who hasn't, we are all human. The difference is, I see it as a BIG DEAL! Not least because a spelling mistake that I make could slow down a process which could sadly lead to people being badly injured or losing their life. Now while I fully realise that not many jobs have this level of responsibility and consequence, it's never a good idea to be 'meh' about mistakes, it's sloppy.
Oh and please, patronising much? I've a fairly robust understanding of what In Loco Parentis means, seeing as I've been In Loco Parentis myself on many occasions.