Merlin13KAGL wrote: »What Rolldodger said. Unless it comes across with the 'Discovered ____________' message each time you approach, you're not disocvering it again - it's simply filtered out on your map legend.
Objectives (PvE things) are off, by default, as I recall.
(When you pull up your map, the upper left hand side has an icon that looks like a funnel. Click that, and check/uncheck items to see the overall effect.)