Doubt with stepinfo. Matlab file and program attached

Please find attached the code

sys = fotf([0.08 1.88 0],[2 1 0],[1.8],[0]);
pidi = fotf([1 0],[x(4) 1],[x(3) x(1) x(2)],[x(4)+x(5) x(4) 0]);
sysnew = sys*pidi;
final = feedback(sysnew,1);
%finalWithoutPID = tf([0.01125],[0.0005 0.01175 0.01125]);
time = 0:0.1:10;
[y,t]=step(oustapp(final,10^(-6),10^(6),6,'oust'));
% step(final);
ac =stepinfo(y,t,1)
 step(final)

x is a 5 dimensional value to be taken from variable BestmPosn of 1fractry.mat whhich is also attached here. I need to find Overshoot, Rise Time and Settling time for all the 100 values and store them and find their mean, variance,etc. The problem here is that when I run the attached code to find Overshoot(along with rise and settling time), sometime it gives correct values of these parameters and sometimes incorrect values. Why is this happening?

For example for the 1st value of the variable BestmPosn is sometimes giving overshoot of 0.6629 which is clearly wrong. But sometimes it gives correct values too. I am at loss to understand why is this happening. Please tell how should I rectify it?