Does the window size change each time you connect to different Hosts, or does it change even when you connect to the same Host?
For example, you connected to Host A and resized the window to your liking. Then you closed the session, reconnected to that Host again and opened the session window. Does the window keep its size or do you have to resize it again?
It's hard to say what exactly that might be, looks like general network problems. Do you have issues with that one Host or all of your Hosts? It is important to isolate the issue first to at least figure out where the problem occurs.
Please, check the Host log. You can find it in C:\Program Files(x86)\Remote Utilities - Host\Logs\ . If you see any errors there, such as Socket Error #11001 this may point at Host having troubles getting connected to our intermediary server. I assume that you are using an Internet-ID connection rather than connecting directly using the Host's IP address.
With Remote Utilities you cannot connect in to your mobile phone. You can only connect from it to a remote PC using Remote Utilities mobile client. It does not make sense to add your mobile IP address to the Viewer address book.
Sorry, but there is no such setting. This process is automatic. You should check your Internet / network connection to address the root cause and eliminate the cause of packet loss. Perhaps, there is some security software or policy in place that prevents the network from working normally.