So I'm grouping atoms in a lattice together, and I have other atoms
above the lattice (lattice is bottom 40% of box, other atoms are in
top 60%) when I make the lattice too small when I choose the group by
region command it seems to deform the regions, because when I choose
group wall region 1 (region 1 box 0 10 0 10 0 4), it will take the
atoms it just put down, plus a certain number of atoms that were
placed in the top, and when I use group mobile region 3 (region 3 box
0 10 0 10 4.01 10) it takes the remaining atoms not in group 1.
I'm not sure what's causing this problem, it seems to be alright so
long as the lattice size is around one.