I believe this is incorrect. I made a page detailing all of the invasion spawn locations:DxV04 wrote:There are different spawn points of course for invaders whether they are SoVs or Dark Spirits.
http://darksouls.wikidot.com/invasion-spawn-locations
Blue Invaders should only have different spawn points if it's a ring-based invasion (cat covenant ring or darkmoon blade covenant ring), because those have their own locations. While I was unable to test all locations as both Darkwraith and Darkmoon using the Red and Blue Eye orbs, from what I've seen all locations appear to be identical.
How this relates to Gravelording- the location of your Gravelord soul sign (where you're standing with an active Eye of Death) determines where the invader spawns. If someone where to use a Cracked Red Eye Orb / Red Eye Orb / Blue Eye Orb in the same spot as a Gravelord sign, they'd wind up in the same location.