While in theory I'd agree with you, the software is probably not advanced enough to realise that you are only bringing him on when the game is already safe, which I think is understandable.
But would you really prefer to go back to previous versions where you don't get any input from the fans on signings, results, etc.?
I think not.
We should be grateful that such a feature has been added and also realise that it isn't always going to be ideal and understood as we would like but is still very much a welcome addition.
This isn't a criticism of you here btw but I just think that sometimes people expect a little too much.