Process Output Data for stresses


Hello Everyone,

I am a new user of Nastran. I have analysed my model with Elastoplastic (10.NL Static), and I see that the stresses have been changed (picture 1). Then I present stresses by Material direction (picture 2), but when I listed stessses by Process Output Data, the X normal Stress and the Y normal  stress are permuted.

How can I prove this problem to obtain stesses in the same colonn ?

Thank you very much for yous answer.