How often is Jeff blindsided at Tribal Council?

It seems Production will almost always loop Jeff into the vote/who the targets are going to be that evening at Tribal Council based on what they know from confessionals and contestants talking to each other.

My question is when contestants are able to surprise Jeff: 1) did Jeff know that Amanda was in on the plan to take out Ozzy in Micronesia as Parvati and Amanda strategized off camera (even though Amanda didn't vote Ozzy)? 2) has a target correctly played an idol on themselves at tribal without tipping off production that they were going to play it? 3) when Gabler said "we're about to do something historic" at the after-show and Jeff was like "what's happening", was Jeff at least aware of Gabler's confessionals saying he'd donate the money?