Are you sure the RO has no powers? The court said results at the CONSTITUENCY level are final, not polling station level.
In my understanding of that ruling, a returning officer can make correction, subject to consensus from party agents involved. This is actually one of the reasons why results transmitted from polling stations to Bomas might differ with what is finally presented officially on Form 34B.
It is definitely her work to ensure that such blunders, whether inadvertent or deliberate, are vigorously contested. Of course, the party agent must have called her to let her know of his objections, which is also niemal in his role. The R.O. made a human error but was too stubborn to admit it and correct himself.
Clearly you have thought deeply for all of us and decided that Uhuru really got 440 votes.