Several Integrator Initial conditions

Hi please help me, i have established my model as shown. i want to add an array of initial conditions [-2:2] in the first integrator of x_dot when i did this the system response is totally different from adding each initial condition in separate form.on adding the initial conditions in separate form i got the right response but i had to run the model for each initial condition, i want to add this array of initial conditions and get the same response as separate one. what can i do??