Right, all trac's on fedorahosted send email as:
"Trac name" trac(a)fedorahosted.org
and I think the name in "s has confused hyperkitty.
Very likely, it's probably using the last one it's seen as the display
name. Since the email address is the key, I'm not sure if we can do much
about it on HyperKitty's side, but I'm opened to ideas.