Y U NO UPDATE RULE 4?!

1. It's mutable.
2. >>18 changed it (and wasn't caught not complementing the previous poster).
3. >>20 didn't reflect this.
4. >>23 changed it but broke a rule.
5. >>24 rolled it back to >>18's state.
6. >>25 didn't reflect it.

It's mutable and it was changed, come on!