I haven't really done any mothership contracts so I don't know if this is a feature or a bug. Yet every time I click on a mission the reward is always significantly below what it lists for example on the contract screen it lists for a 238% mission it lists 17.635.375.000 credits yet when I click on accept on the next screen it only shows 10.581.225.000 credits. I have the fleet cost calculator turned off so I know that this is not effecting it.
Same thing happening to me Reported it in the bugs section