XY data report : Contact output duplicated

[Bayram2014]

Hello,
I am studying contact between two solids in a plane stress formulation.
When I want to output the contact information at one of the contact surfaces (lines in 2D), i first defined a Path that is one of the contact surfaces, than made XY report. I got duplicated nodes like :"
/ X _temp_2

0. 3.53902E+03
0. 3.72606E+03
997.506E-06 -7.15461E+03
997.506E-06 -7.39891E+03
1.99501E-03 -9.91474E+03
1.99501E-03 -10.2553E+03
2.99252E-03 -10.7182E+03
2.99252E-03 -11.102E+03
3.99002E-03 -12.3683E+03
3.99002E-03 -12.7635E+03

Because, I think, it is writing values from both contact surfaces at my path nodes.
How could I ask for just values from down or up surface (Slave or master)?
Thanks for any help,
Sab

 

[FEA way]

First, it would be good to know what software you are using.

 

[Bayram2014]

I am using abaqus

 

[Bayram2014]

I have these ascillations when plotting stress at one of the contact lines (surfaces in 2D plane stress).
regards