error real space spin density difference of Right electrode after ts calculation at 0 bias

Dear all:

 I calculate the transport property of graphyne nanoribbons at antiparallel spin configuration. Analysis of "Rho.grid.nc" of the Scattering Region, I found real space spin density difference of the Right electrode is totally different form that of the right electrode bulk . I don't know the reason. Can someone give me some advice? My fdf file of the SR as follow:

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SystemName z4 # Descriptive name of the system
SystemLabel z4 # Short name for naming files

# Output options

#WriteCoorStep 1
WriteMullikenPop 1
WriteDenchar T # Write information for DENCHAR

# Species and atoms

NumberOfSpecies 2
NumberOfAtoms 288

%block ChemicalSpeciesLabel
  1 6 C
  2 1 H
%endblock ChemicalSpeciesLabel

%block kgrid_Monkhorst_Pack
   1 0 0 0.0
   0 1 0 0.0
   0 0 6 0.0
%endblock Kgrid_Monkhorst_Pack

LatticeConstant 1.0 Ang

%block LatticeVectors
58.399550000000000 0.000000000000000 0.000000000
 0.000000000000000 30.000000000000000 0.000000000
 0.000000000000000 0.0000000000000000 62.83239471
%endblock LatticeVectors

#%block AtomicCoordinatesOrigin
#0.0 0.0 -13.9627543800
#%block AtomicCoordinatesOrigin

xc.functional LDA # Exchange-correlation functional
xc.authors CA # Exchange-correlation version

SpinPolarized T # Logical parameters are: yes or no
MeshCutoff 300. Ry # Mesh cutoff. real space mesh

# SCF options
MaxSCFIterations 60 # Maximum number of SCF iter
DM.MixingWeight 0.1 # New DM amount for next SCF cycle
DM.Tolerance 1.d-4 # Tolerance in maximum difference
DM.UseSaveDM T # to use continuation files
DM.NumberPulay 6

ElectronicTemperature 25 meV

# AtomionicTemperature.rdinates
AtomicCoordinatesFormat Ang
%block AtomicCoordinatesAndAtomicSpecies
16.10000000 15.00000000 1.74534000 1 1
16.10000000 15.00000000 8.72671719 1 2
16.79975000 15.00000000 2.95735000 1 3
16.79975000 15.00000000 9.93872719 1 4
..........
34.93790000 15.00000000 62.29905752 1 286
15.00000000 15.00000000 50.61498033 2 287
15.00000000 15.00000000 57.59635752 2 288
%endblock AtomicCoordinatesAndAtomicSpecies

#############################################################
####transiesta
SolutionMethod transiesta
%include NEW.fdf
TS.SaveHS true

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NEW.fdf
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TS.Voltage 0.00000 eV
TS.ElectronicTemperature 25 meV
%block TS.ChemPots
  Left
  Right
%endblock TS.ChemPots

%block TS.ChemPot.Left
  mu V/2
  contour.eq
    begin
      c-Left
      t-Left
    end
%endblock TS.ChemPot.Left
%block TS.ChemPot.Right
  mu -V/2
  contour.eq
    begin
      c-Right
      t-Right
    end
%endblock TS.ChemPot.Right

TS.Elecs.Bulk true
TS.Elecs.DM.Update cross-terms
TS.Elecs.GF.ReUse true
%block TS.Elecs
  Left
  Right
%endblock TS.Elecs

%block TS.Elec.Left
  HS ../../../lead1/z4.TSHS
  chem-pot Left
  semi-inf-dir -a3
  elec-pos begin 1
  used-atoms 64
%endblock TS.Elec.Left

%block TS.Elec.Right
  HS ../../../lead2/z4.TSHS
  chem-pot Right
  semi-inf-dir +a3
  elec-pos end -1
  used-atoms 64
%endblock TS.Elec.Right

TS.Contours.Eq.Pole 2.50000 eV
%block TS.Contour.c-Left
  part circle
   from -40.00000 eV + V/2 to -10. kT + V/2
    points 40
     method g-legendre
%endblock TS.Contour.c-Left
%block TS.Contour.t-Left
  part tail
   from prev to inf
    points 10
     method g-fermi
%endblock TS.Contour.t-Left
%block TS.Contour.c-Right
  part circle
   from -40.00000 eV - V/2 to -10. kT - V/2
    points 40
     method g-legendre
%endblock TS.Contour.c-Right
%block TS.Contour.t-Right
  part tail
   from prev to inf
    points 10
     method g-fermi
%endblock TS.Contour.t-Right

TS.Elecs.Eta 0.0001000000 eV
%block TS.Contours.nEq
  neq
%endblock TS.Contours.nEq
%block TS.Contour.nEq.neq
  part line
   from -|V|/2 - 5 kT to |V|/2 + 5 kT
    delta 0.01 eV
     method mid-rule
%endblock TS.Contour.nEq.neq

# TBtrans options

TBT.Elecs.Eta 0.0001000000 eV

%block TBT.Contours
  neq
%endblock TBT.Contours

%block TBT.Contour.neq
  part line
   from -2.00000 eV to 2.00000 eV
    delta 0.01000 eV
     method mid-rule
%endblock TBT.Contour.neq
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