modgen issue (layout flipping horizontally/vertically)

Hi All, 

I am facing some issues with the Modgen editor. 

Some patterns are automatically getting flipped, sometimes horizontally and sometimes vertically. The one in the attachment got flipped horizontally. Please compare the Table on the right with the layout. 

This happens only when modgen is created through skill command (gpe*). This means that when I start with a layout with no flip issue and manually modify it to a problematic layout, it does not flip.

I have the following skill code to generate the modgen automatically. Any help is highly appreciated. 

SKILL code

procedure(topologyGen(layout_view data noOfRows noOfCols noOfDevices T_vec Map_vec)
geSelectAll()
instList = geGetSelectedSet()
sbox = gpeCreateSandbox(?sync t)
masterList=()
i=0
while(i<noOfDevices
;println(i)
;printf("%s %s\n", T_vec[i], Map_vec[i])
tmp=list(T_vec[i] Map_vec[i])
masterList = cons(tmp masterList)
i=i+1
)
gpeSetMap(sbox masterList)

masterList=()
itr=0
i=0
while(i<noOfRows
j=0
tmp=()
while(j<noOfCols
tmp = nconc(tmp list(data[itr]))
itr=itr+1
j=j+1
)
;println(tmp)
masterList = cons(tmp masterList)
i=i+1
)
gpeSetGrid(sbox masterList)

masterList=()
i=0
while(i<noOfRows
j=0
while(j<noOfCols
tmp=list(i,j)
masterList = cons(tmp masterList)
j=j+1
)
i=i+1
)
gpeAbutGridEntries(sbox masterList)
gpeSetAbut(sbox nil) ;comment this out for abutment
geDeselectAll()
printf("finished creating topology\n")
)

Regards

Supriyo