After I transported the man/monster from the dragonic race along with everyone in the cell to Andro's back, I continue to the next cell.
Even if some of them can fly and can fly away from Andro, I don't care. I told Andro to keep his intimidation at all time until I return. Just a little bit of intimidation should be enough to keep the monsters stay at his back.
The second cell, I see more monsters. But good thing that they still have their senses. I can talk to them. Maybe I shouldn't open a portal after entering each cell. I'll just gather all those who will be moved to Andro's back together. So, I told those at the second cell to wait. And since they listened to me when I spoke to Gecko, I don't have to keep repeating what I say.
In the second cell, some of the monsters are still connected with contracts. But no summoning contract. They got contracted by tamers. They are fine to be moved then.