dont add the custom fields added to the listing packages page.

I have added for you a Skype in your fields, you have deleted it. It shows on registration (Mandatory if you choose or not)and it shows in Listings details page in the order you choose, than it is displayed (as phone numbers are) in a ‘Detail’ tab on a listing page, which does show to viewers.
What is it that you want? Loosen up man, just make it clear what you want because, I thought I have created for you what you wanted.