On the map upload page it says
Points: Points are now stored in the database and are shared for maps of the same zone. If you try to upload points that already exist, they will be ignored.
But I don't see anything that tells me how to upload corrections to existing map points. For example, the Blightfire Moors zone recently had the portal to Plane of Knowledge moved to be near the zone to Crescent Reach. For another example the Old Kithicor map has the Void portal to Plane of Time and the 2 scouts in the wrong place. How do we correct things like this?