Hi All,
Please help me for resolving my problem.The problem is

Multiple Billing address fields show up in Account Field Set Page for selection.But i can't see the individual fields of Billing address for selection in the same page.(The individual fields are Billing city,Billing Postal code,Billing Street,Billing State and Billing Country).

Steps to get to the Field Set Page where i see the issue:
1.Go to Setup in the Org
2.In the Setup Page,Navigate to Customize -> Account -> Field Sets.
3.Account Field Sets Page will open
4.Click edit on any existing Field Sets or if there is no Field Sets already created, then Create a New Field Sets by clicking New Button.
5. Then you will be in Field Sets Editing Page and Drag & Drop Box will appear and it can be used to add fields from it to the current Field Sets.
There only, i am facing one issue.The issue is that if We want to add a field 'Billing City or Billing State' in the fiels sets, we wont see them in the box.But,We will see 10 Billing Address Fields in the Box.Earlier, I used to see fields like Billing City,Billing State,Billing Country,Billing Postal Code and Billing Street.But Now None of them is there except Billing Address.

What i want is that i want to display Billing City,Billing State,Billing Country,Billing Postal Code and Billing Street in the Drag & Drop Box for adding them in the Field Sets.Can anyone please give a way to do the same? 

Attached Screen Shot of My Issue: 

Hi ,
i have a doubt. Custom button is not displaying on apex:relatedList section in visualforce page. May i know apex:relatedList will support for custom button or not?