Complex form of results vs Real/Imaginary form in ABAQUS and mode shapes

For a particular geometry, I have carried out modal analysis and have obtained certain mode shapes at natural frequencies. 

 

When we carry out the steady state, if i choose the magnitude option in complex results, the mode shapes are a bit distorted. If I select the real/ imaginary results, the shape looks like the modal analysis results.

 

Can anyone explain me how the results can eb interpreted better?