LAST EDITED ON 11-07-14 AT 08:57 AM (EST)

I agree, I think it is Alec and Jon. You would think, however that the winning tribe would have to exile one of their own, and one from the losing tribe. But, clearly, I think Alec and Jon are not in the line up...

Then, for comparison, here is how they walked into the IC last week when they were all present...

The order left to right: Alec*, Reed, Jeremy, Josh, Wes, Keith, Missy, Julie, Natalie, Baylor.
So Jacklyn and Jon must be behind Wes...
*You can see that Alec is actually shorter than Reed...

ETA: Here they are as they lined up for the reward challenge on the mat:

They are in order...

You can see they filed onto the mat as they arrived to the challenge:
As they arrived, front row first: Baylor, Natalie, Missy, Keith, Wes, and Josh, then the next row, still filed in as they arrived in line: Jeremy, Alec, Jacklyn, Reed, Jon. This is the order they would arrive. Now check out the mat pic for the IC:

The first arrivers in line on the front row: Baylor, Natalie, Missy, Keith, and Wes.
Then, the second row...Josh, Jeremy, Jacklyn, and Reed, as they were noted in the first picture...

Jon and Alex are clearly out of place....according to how they filed in...
*Long story short = You NAILED it, Sheldor! :-D But, the tease says, they exile ONE of their own. The only room for another in the approaching line up, imo, would be behind Reed...Could Jon be the only one exiled....if Alec is behind Reed in the line up, Jon would be the most out of place. You can clearly see in the line up pic arriving that he is NOT behind Jacklyn, but Alec could possibly be present hidden behind Reed?