before to follow moi to sketchup

Seems there is something in the box of object! For a simple Solid box
I have 2 decimal numbers in MOi (In general option)
but when I enter for the box in the windows object in cm
x= 32.24
y=16.12
z=8.06

I obtain
x= 32.24
y=16
z= 8

I must return in each y and Z for input decimal!
Is that normal??? beta 21 nov 2008