We realized the display wouldn't be right for the player at the last min, so we need to change the way it is calculated to display a correct result. We thought we would have been able to change it shortly after the servers went live, but due to obvious reasons we have had to put it as a lower priority. We are getting pretty close to having most of the issues ironed out and we'll be able to focus on some of the other server additions we wanted to get in.
Currently the actual result earned is calculated when you reach your destination, we need to move that to when you are at the source planet.
On a side note. You need to be in orbit of the other persons planet that you are trading with. When your harvester is in orbit you will see a trade icon. You will then set what world of yours you want to trade with. You can only have a 1:1 with any specific planet. So if you are trading from your homeworld to someone elses home world that connection can only exist once.