How get the data matrix in the order of "FID" from the fields of shpfile

I am scripting with python and ArcGIS 10.1. I want to get fied data from the shpfile, what I did are as follows:

ssdo = SSDO.SSDataObject(inputFC, templateFC=OutputFC)
masterField = UTILS.setUniqueIDField(ssdo, weightsFile=DistM)
self.allVars = [self.DeVar] + self.IndeVars
ssdo.obtainDataGA(masterField, self.allVars, minNumObs=5, warnNumObs=20)
self.y = ssdo.fields[self.DeVar].returnDouble()
self.x = NUM.ones((self.dp_n, self.var_n), dtype=float)
for i in range(1, self.var_n):
self.x[:, i] = ssdo.fields[self.IndeVars[i - 1]].returnDouble()
....................

BUT I found the populated "y" and "x" data is not in the order of "FID", for example:

In the original shpfile,
(Intercept) FLOORSZ
0 1 54
1 1 82
2 1 65
3 1 90
4 1 132
5 1 76
6 1 56
7 1 76
8 1 48
9 1 45
10 1 87

BUT in the populated "x" data:
[ 1. 80.]
[ 1. 94.]
[ 1. 150.]
[ 1. 97.]
[ 1. 83.]
[ 1. 98.]
[ 1. 254.]
[ 1. 108.]
[ 1. 80.]
[ 1. 194.]


Anyone can tell me what happened here? And how can I make the populated data are in the order of FID?

Many many thanks!