Open address book, select your user name address book, new Group

Select Group Members selector comes up

I my case I can search fine for anything below Enyuan & the search works

If I search for anyhing above ie Eleanor (yes, my users name for students is
set as first name! so it is Eleaanor, Thompson
then the seach does NOT fine the user, but some random user above & the
scroll bar down actually scrolls UP!

That is mad! Anybody seen this?