really poor transient simulations for an LM3150 design

I posted this in another forum but it was suggested I put it here instead:

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Hi,

I did a design in webench using the LM3150 and pretty much set it up the way it was advised.  When I run the Vin and Iload transient simulations the results are terrible.  i.e. 1/2V shift in the output with a 1V input step, accompanied by oscillations.

Can someone evaluate if this is a valid simulation response for me?

I suppose I need an email to share the design to.

Thanks.