I joined this forum just a couple of months ago and have posted only a few times, but notice that someone else's posts dating back one and two years ago are showing up under my user name -- which, besides their being ex-Calvary Chapel and I ex-Landmark, can be easily verified by the fact that their posts pre-date my registration date. But that's all I know! I'm not even remotely sure how long this has been the case as I only happened to notice it today upon an infrequent visit to the control center.
If you meet the Buddha on the road, kill him. (zen koan; never be misled by others.)