integrate identical values give different results

I am using second order integration simulink block to integrate the acceleration to get the velocity and position, I have two data sets measured and actual. The acceleration for measured and actual are identical but the velocity and position from the two second order integration blocks are not identical I attached copy for the acceleration plot and the position plot

I

I

Acceleration:

I

I

Position:

[Birdman]

Can you share your model? I need to see the inside of blocks and generally, your model.

[John D'Errico]

If you get different results, then something is not identical. If you won't show enough of what you have for someone to replicate what you did, then how can you expect more of an answer?

[mike]

When I subtract the signals the maximum value round 3×10^-16

[mike]

   please see this link for exact problem   https://drive.google.com/openid=0BycJ_aTQNwAUbzBja1dVMWc2TUFRX20yZnVVRmJLSGpxU2M0

also I posted a question for the problem with more description

https://www.mathworks.com/matlabcentral/answers/392001-integrate-identical-data-give-un-identical