[lammps-users] a problem of unfix

Please post to the mailing list and not to me directly.

In the first case, your 2nd fix command will override the
1st since it is the same ID and same style.

In the 2nd case, you are replacing the 1st fix with
the 2nd, which should be the same thing, except
the two fix 2 commands are different between the
2 cases.