Zana mission only spawned three portals in the map room.

I was doing my daily mission with myself and three other people and when we entered the map room only three portals were avaliable to go into the map. I was unable to take a screen shot as everyone entered the portals to fast.The map was called Dunes.

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http://i.imgur.com/zmX75TB.jpg (Sorry for not cropping the screen shot and it doesn't show anything)

This likely happened because Zana only saw three people, one portal per person. The rule of thumb here, is to make sure everyone is there first, then to talk to Zana, more importantly, only the person who's responsible for the map, or the daily should. As it would imply their responsibility.

I've had an issue similarly, and was resolved in doublechecking making sure everyone was present.