School lists: Mistake! Mistake!

[Kirstini]

No: HPFGUIDX 69750

Rita the Cat Lady's post reminded me that I'd been meaning to check 
those lists for some time, as a friend of mine had some sort of 
dodgy theory about them. Well, look what I noticed on the first 
photo at:
http://photos.groups.yahoo.com/group/hpforgrownups/vwp?.dir=/Harry+Po
tter+%26+Me&.src=gr&.dnm=schoollist1.jpg&.view=t&.done=http%
3a//photos.groups.yahoo.com/group/hpforgrownups/lst%3f%26.dir=/Harry%
2bPotter%2b%2526%2bMe%26.src=gr%26.view=t

Oh, man, that's a big link. Anyway – if Brown, Lavender has a G 
beside her name, Bulstrode, Millicent has an S beside her name, and 
Abbot, Hannah has an H beside her name, why the dickens does Corner, 
Michael, Ginny's *Ravenclaw* boyfriend, have an H beside his name?
Kirstini