It seems that you are having some issues with the connection to your Slingbox, since you get a different behavior wether you use the Administrator account or the View-Only account.
First, there's no relation between the account profile in use and the connection speed issue, since you are using the same Slingbox and its own Slingbox ID. We'd like to know if you are having this issue when getting the connection at the same network or when trying to get the remote connection from a different network (Internet Viewing).
We recommend you to be as specific as possible about the issue you are having. This way, other forum users will be able to help you with accurate information.