Hi all,
I have the following problem:
using the margins plot command to look at the graph between my independent variables, FSTS and FATA (foreign sales/total sales and foreign assets/total assets respectively) and my independent variables, HHI and HHISQ (standardized values of ethnic concentration indices), I see those tables:

Code:
margins, at(HHI2=(-2423761(1117477)3163628))

Predictive margins                              Number of obs     =      1,275
Model VCE    : Robust

Expression   : Linear prediction, predict()

1._at        : HHI2            =    -2423761

2._at        : HHI2            =    -1306284

3._at        : HHI2            =     -188807

4._at        : HHI2            =      928670

5._at        : HHI2            =     2046147

6._at        : HHI2            =     3163624

------------------------------------------------------------------------------
             |            Delta-method
             |     Margin   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         _at |
          1  |   2.91e+11   8.52e+10     3.42   0.001     1.24e+11    4.58e+11
          2  |   8.45e+10   2.48e+10     3.42   0.001     3.60e+10    1.33e+11
          3  |   1.77e+09   5.17e+08     3.42   0.001     7.52e+08    2.78e+09
          4  |   4.27e+10   1.25e+10     3.42   0.001     1.82e+10    6.73e+10
          5  |   2.07e+11   6.07e+10     3.42   0.001     8.83e+10    3.27e+11
          6  |   4.96e+11   1.45e+11     3.42   0.001     2.11e+11    7.81e+11
------------------------------------------------------------------------------


margins, at(HHI2=(-2423761(2793694.5)3163628))

Predictive margins                              Number of obs     =      2,153
Model VCE    : Robust

Expression   : Linear prediction, predict()

1._at        : HHI2            =    -2423761

2._at        : HHI2            =    369933.5

3._at        : HHI2            =     3163628

------------------------------------------------------------------------------
             |            Delta-method
             |     Margin   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         _at |
          1  |  -4.88e+13   2.68e+13    -1.82   0.069    -1.01e+14    3.86e+12
          2  |  -1.14e+12   6.25e+11    -1.82   0.069    -2.36e+12    8.98e+10
          3  |  -8.31e+13   4.57e+13    -1.82   0.069    -1.73e+14    6.57e+12
------------------------------------------------------------------------------

As you can see the two functions share the same domain, but not the codename, which is suspicious.
You know what could be the cause of this problem and how I can solve it.

Thank you,
Luca