Why would he be hastily rescore something to be used in a capital murder case, for which he is being paid $250/hour?
I mean, why the need for haste? Why wouldn't you take the utmost care to do things properly, know you are going to be scrutinized.
I don't think it matters in the long run, I think the jury can see he is incompetent and biased and will disregard anything he says.