You can import co-ordinates of control points entered points and any surveyed point from another job into the active job. Use the … dots top right in Projects - points menu
I can't say I have. Minor system changes that need to be addressed but it is manageable. If you come across any issues, please supply your device model/name/type, Android version, and also your Landstar version to support@chcnav.com. I am sure the issues may already have been resolved with a later update version.