Maybe it is the 'Tools > Options > Design > "Drill oversize" value that is causing this difference.
Try setting it to 0 and see what happens.
thanks for your suggestion.i tried it is working now
Are you sure you need grid setting of 0.00001 mils? or do you mean 0.00001 inches?
On the picture I can see your units is in mils.
The lowest grid setting for "mils" units seems to be 0.01.
yes i need grid setting should be 0.00001 mils,is it possible to set like that