Hi Tony,
It seems that different data from expectedis appeared during "first step" in simulation. (Models that do not require convergence calculations, step size become simlation-time / 50. I guess in your case step size maight be 0.5s,)
Please check whether there is the block which have state(like unit delay block) in your model. If there is, the initial value setting of that block might not be correct.
I hope this will help.
