Moving a schematic object without loosing the connectivity

Hello,

I'm trying to move a set of schematic objects using skill. I'm using the function schStretch so that I don't loose the connectivity.
Suppose, I've a mos instance in a schematic. Using the below commands, I'm replicating the scenario.
css()~>xy => (1.0 1.0) ; the initial location of the instance
tr = list( 1:1 "R0" )
schStretch( list(css()) tr )
css()~>xy =>(2.0 2.0) ; moved by (1 1) specified in the transform.

But, when the transform is, say
tr = list( 1.008:1 "R0" )
schStretch( list(css()) tr )
css()~>xy =>(2.00625 2.0)
I was expecting the location to be (2.008 1).

Why is this happening? Isn't this what's expected out of this command? If not what's the command to move an object(all sch objects) by a distance without loosing the connectivity?

Any help would be appreciated.

Thanks,
Leo