So I went on creative1 like everyday, when I noticed this plot next to spawn: http://imgur.com/a/yYxEb which is owned : and when I try to do /p i this comes up : http://imgur.com/a/f0lcF also, everyone can build on it.
I can confirm that this is fixed, and that people can no longer enter denied plots (I have tested it personally). Locking now, /c Futher reference: http://itsjerryandharry.com/threads/you-can-build-break-on-denied-plots.97750/