Me in Texas and my friend in California, have been D/Cing together too while farming sheep. he just started the game and i didnt know before he joined if it was just me but now i know its the whole zone. SE has like a network of diffrent zones we seamlessly walk through as we move around. it seems some of these zones crash at various times.
aka your in limsa with 2 guildies all 3 crash, all other LS members scattered throughout the world none on that cube on the map in limsa you are... none of them crash.
Osarion = Red Mage
Mikhalia = Black Mage Evilwizardington
FinalFanXIV = Fighter McWarrior
All we are missing is Thief, Clan Khee'Bler and we will have the full Light Warriors party.