create_atoms and region sphere radius ( wrong?)

Dear Lammps-users,

I have a question on create_atoms and region sphere commands.
In manual it's written that region sphere accepts radius in units of length.

I create 2 types of atoms (inside sphere and outside),
but when I check/visualize it in VMD, it seems that radius is wrong (I attach .jpg),
it's definitely larger than 6 A (compared to 3.6150 lattice spacing).

------- input file ---
units metal
atom_style atomic

# create domain
lattice fcc 3.6150 origin 0.25 0.25 0.25
region mdRegion block -5 5 -5 5 -5 5
boundary p p p

create_box 2 mdRegion

region mySphere sphere 0.0 0.0 0.0 6
region theRest sphere 0.0 0.0 0.0 6 side out

create_atoms 1 region mySphere
create_atoms 2 region theRest

...

eam_vmd.jpg