Possible Bug When Setting the ReturnPath

I have been trying to resolve this issue now for a few days. I can't seem to get to the bottom of it.

In the UE (V4) Dialogue, I am trying to set the;

1) "From Name" This does not work - it will not save the setting when I press ok. Therefore when I do a test email the From Name does not show.

2) Return Path - This does not work, When I do a test and check the email, the return path is always the sender's email address. This is important as the Return Path catches bounces which are then piped to a php script. Currently then, the bounces are going to the senders email which is quite frustrating.

Anyone suffered this or got a work around?

Any help much appreciated.