It sounds like you are talking about the flex-relate field, within your custom module Servers. If you enter an account name here, it will not show in the Accounts subpanel as this is a different relationship. If you select a server within the Servers subpanel within Accounts, the server will be related to the Account/client. This is how to utilise the relationship, as the account will have many servers you would add the servers utilising the subpanel.