"v.transform" reports erroneous values ​​in the transformati

GRASS 6.4.2 (mvc_georreferenciado):~ > v.info -g map=tmp
north=7568.35682138
south=7555.17449627
east=4125.22919179
west=4102.51049188
top=0.000000
bottom=0.000000
GRASS 6.4.2 (mvc_georreferenciado):~ > v.transform --quiet -m --overwrite  input=tmp output=tmp_geo pointsfile=/archivos/trabajo-final/desarrollo/georreferenciacion/gcp.txt
WARNING: Vector map <tmp_geo> already exists and will be overwritten

                CHECK MAP RESIDUALS
                Current Map                  New Map
 POINT      X coord    Y coord  |        X coord   Y coord    |      residuals

  1.       6956.44      6873.48 |   5471138.65     6321670.34 |         0.00
  2.       5561.89      6485.82 |   5469840.44     6322310.42 |         0.00
  3.       7719.19      6540.58 |   5471485.63     6320913.89 |         0.00
  4.       6125.73      6988.66 |   5470595.93     6322309.71 |         0.00


  Number of points: 4
  Residual mean average: 0.001529


Transformation Matrix
| xoff a b |
| yoff d e |
-------------------------------------------
-139153.031250 0.745704 0.666283
8352534.450195 -0.666280 0.745699
-------------------------------------------
GRASS 6.4.2 (mvc_georreferenciado):~ > v.info -g map=tmp_geo
north=6324089.21612787
south=6324065.85188136
east=5469488.79395682
west=5469466.26666302
top=0.000000
bottom=0.000000
GRASS 6.4.2 (mvc_georreferenciado):~ >