I honestly do not know. Both do indeed appear blue to me. Warlock Krowklaws unfortunately died some time ago, as you stated correctly; I recall Magister Koerbagh posting a few times but never knew him personally and cannot speak to his present disposition, whether he parted ways, died, or what. I cannot do a member search by name color...though I can search by nearly any other criteria, so I cannot guess who the other person you reference is.
As for titles, that's a known forum bug. Some were probably italicized by mistake, others were probably "victim" of a title bug we had some time ago.
"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."