before you upgrade, you get a look at how much credits a trade port will generate, resp. how much the culture rate of advent nodes will be. however, once they are complete, I have not yet had a case, where the rate displayed in the info card matched that previously, they are always significantly higher than was described. I varied income generation rate, excluded longer trade lines as the reason and I had not yet had any research to improve trade income.

for example, in one game, fast settings, I have starbase at a sun with 2 trade modules, the last of 4 stations (others all planet bound). it displays an income of 5.4, when according to the original upgrade information it should provide 3.0. under slow income setting it produced something like 4.7 or so and a trade line that short would create maybe .1 or .2 extra income per station.

for culture I observed similar effects.

so ... am I missing something elemental? otherwise it should be fixed and the values should be the same.