Account doesn't use shared IP

Hello, I am configuring a new WHM setup. Right now, I have two public IP's assigned. The first is listed as the "Main/shared IP for: nobody and root". The other is an address I marked as "Reserved". I have no resellers - just "root". 1) I would like to have multiple shared IP's. I read another article that said I could accomplish this through reserving the IP's then rebuilding the IP address pool, which I did. But it doesn't state anywhere that this IP is shared. In fact, when trying to "Change Multiple Sites' IP Addresses", I get an error on the second site that says "Sorry, x.x.x.x is in use by another domain name and is not a shared ip. 2) When I assign an account an IP address or change the IP address of an account, it dedicates the IP address to that account and it then cannot be used by any other accounts. This is frustrating. This is true even with the "Main/Shared IP". Help please?