Hi Mary,
I did become aware of it a few weeks ago. It is an error in my resetting of permissions in setting up a parent account and not an intentional outcome.
unfortunately due to work commitments in school (you know, that actual pesky job of teaching the children!! lol!!!) I have not yet had opportunity to go in and fix my errors and with both not having had any issues to date, and with my intention to upgrade to Moodle2 anyway over Christmas, the fault has managed to find its way to the bottom of my priority list - although I do know as a security issue this should definitely NOT be the case for an IT webmaster, as a teacher who doesn't get any website management time other than my own at home... Again, unfortunately, persuading the powers that be that my website is a crucial part of the home-school links and informative to prospective parents and so beneficial to both the school and the pupils currently falls on, if not deaf, then rather hard of hearing ears! But as with all teachers we continue to do what we can as much and as well as we can for the children 
ps. your moodle for teaching 7-14 year olds was/is! a fantastic resource which I used extensively in my own learning during the summer holidays and since (I have a localhost instal on my school laptop which I use with my class as our school network can be frustratingly slow!)
Thanks
Richard