Oh damn. I forgot all about that Savannah picture on the cell phone. Yeah that makes no sense at all. Why would a human Kaliba goon have that if the machine was sent to take care of Savannah? Wow, if that's part of a set-up to get the Connors to go to Weaver's house that's one hell of a complex plot.

Hmmm.
No, I don't think it could have been a set-up because the kaliba goons were clearly trying to kill John. So putting a picture on a cell phone for John to find would have meant the goon was intending for John to get away and come back and find the cell phone. But that spray of bullets coming at John and Charley when they were running through the sand didn't look like they were intended to miss.

I guess I'll have to go with this Kaliba goons are just plain stooopid.