Same here. I've played every game Bungie game since the original halo. All of them online and halo.bungie.net confirms that I've at the very least played Halo 2, 3, ODST, and Reach. The only reason I can think of is that now I'm playing Destiny on the PS4 but that doesn't make since because both my PSN and Xbox Gamertag are linked to Bungie.net.