Getting different result deploytool .dll and matlab

I have a autocorrelation function in matlab and i have a data but i get different result in matlab and C#.

Here is my Code in matlab i get 56 value:

function feedbackDelay=Autocorrelation(TargetSeries)
N = length(TargetSeries);
zt = zscore(TargetSeries,1);
autocorrt = nncorr( zt, zt, N-1, 'biased' );
[ sortact FD ] = sort(autocorrt(N:end),2,'descend');
for i=1:length(sortact)
    if(sortact(1,i)>=0.80) 
    feedbackDelay(1,i)=FD(1,i);
    %AAA(1,i)=sortact(1,i);
    end
end 
[max maxInd] =findpeaks(autocorrt(N:end));
maxInd = maxInd(1,1:5);
DataInv = 1.01 - autocorrt(N:end);
[Minima,MinIdx] = findpeaks(DataInv);
MinIdx = MinIdx(1,1:5);
feedbackDelay = [feedbackDelay maxInd MinIdx];
feedbackDelay = sort(feedbackDelay);
end

but i use deploytool,got .dll and references in C# i get 10 different result. Why is happened ?