CDO

This follows up on an earlier email inquiry; I decided to try and use this support page. My question has to do with why a CDO remap shifts my longitudes by 180 deg, this is noticeable in the longitudes of the first cdo sinfo command shown below, where it states 'lon : 180.05 to 539.95 by 0.1 degrees_east circular'. I suspect it has to do with my weights, but am not sure. In anycase here are the details:

$cdo -P 2 remap,/work/ka1081/Hackathon/GrossStats/0.10_grid.nc,/work/ka1081/Hackathon/GrossStats/ICON_R2B10_0.10_grid_wghts.nc -selname,TQV_DIA /work/ka1081/DYAMOND/ICON-2.5km/nwp_R2B10_lkm1007_atm1_2d_ml_20160803T000000Z.grb TQV_DIA_0803_remap.grb

$ cdo sinfo TQV_DIA_0803_remap.grb 
   File format : GRIB2
    -1 : Institut Source   T Steptype Levels Num    Points Num Dtype : Parameter ID
     1 : MPIMET   unknown  v instant       1   1   6480000   1  P16  : 214.1.0       
   Grid coordinates :
     1 : lonlat                   : points=6480000 (3600x1800)
                              lon : 180.05 to 539.95 by 0.1 degrees_east  circular
                              lat : -89.95 to 89.95 by 0.1 degrees_north
   Vertical coordinates :
     1 : surface                  : levels=1
   Time coordinate :  unlimited steps
...

For reference

$ cdo sinfo /work/ka1081/Hackathon/GrossStats/0.10_grid.nc
   File format : NetCDF2
    -1 : Institut Source   T Steptype Levels Num    Points Num Dtype : Parameter ID
     1 : unknown  unknown  c instant       1   1   6480000   1  F32  : -1            
   Grid coordinates :
     1 : lonlat                   : points=6480000 (3600x1800)
                              lon : -179.95 to 179.95 by 0.1 degrees_east  circular
                              lat : -89.95 to 89.95 by 0.1 degrees_north
   Vertical coordinates :
     1 : surface                  : levels=1
cdo sinfo: Processed 1 variable [0.03s 32MB]

The weights were created as

ncdump -h /work/ka1081/Hackathon/GrossStats/ICON_R2B10_0.10_grid_wghts.nc

...
// global attributes:
        :_NCProperties = "version=1|netcdflibversion=4.6.1|hdf5libversion=1.8.14" ;
        :title = "SCRIP remapping with CDO" ;
        :normalization = "fracarea" ;
        :map_method = "Conservative remapping using clipping on sphere" ;
        :conventions = "SCRIP" ;
        :source_grid = "unstructured" ;
        :dest_grid = "lonlat" ;
        :history = "31 Aug 2018 : cdo -P 16 --cellsearchmethod spherepart genycon,0.10_grid.nc -selname,cell_area /work/bk1040/experiments/input/2.5km/icon_grid_0017_R02B10_G.nc ICON_0.10_grid_wghts.nc" ;
        :CDO = "Climate Data Operators version 1.9.5 (http://mpimet.mpg.de/cdo)" ;
}