Can you please explain better?
“I see double windows side by side”
What windows are they? Do you mean that you get 2 player windows instead of one?
“with a very crappy, low quality screen”
What is crappy? The screen of the remote server displayed in the player window on the client side?
Where is the server machine you are connecting to? Is it on your LAN?
Can you send a screenshot to the support?