The effect from commercial area is applied correctly and the sum of all effects is correct how ever when listing all effect that it just doesn't mention that assents produced happiness.
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Here you can see 2 effects that should add up to 0 increase the happiness by 3 because the zone has a ...

Hey i noticed a similar issue in the preview points map mode
i have a crossing between two cities with a third path set to pull points only
when i turn on the map mode it show the expected traffic that that indeed matches the next turn
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however when i select truck depo that is closer and ...