Hmm-m-m... This is strange. Is there a section titled: "Optional Information - All information will be viewable by other forum members." ? (The section also has date-of-birth information in it.) The "Custom User Title" box should be first & the date-of-birth box should come after that. Then there's a box titled: "Home Page URL" & then one titled: "Instant Messaging".

Maybe all of this appears differently depending on what type of device one is using? That's the only explanation I can think of if the "Custom User Title" box isn't there. Hopefully someone else will have the solution. I don't know if mentioning what type of device you're using to access PC would be helpful to someone in admin. Good luck!