Right now Cal, this Gand, Kacela and Reks have moved forward and watching the mercs. Reks crawled up into a tree. A lizard-bird (Saurian Flier) noticed him and this Gand (Passive Perception vs. Stealth). Their "Stealth" was a 16, higher then Reks and Kacela Passive Perception, so only Cal and this Gand noticed the flier coming down to attack Reks in the tree. So in the surprise round, only Cal, the Saurian Flier and this Gand can react.
Next round, I am using "Group" Initiative, in that the party goes first because Cal rolled higher then any of the badguys (although in the order of your initiative roll, so Cal, then Kacela, then this Gand, then Reks). Then it will be the Saurian fliers turn, then the Mercs.
I am not as worried about initiative within the party but just in case it matter (Cal shoots someone that Kacela was going to fire on).
Back at the landspeeder, next round Jinahna is going first then the mercs in the speederbike.