I think that I could be wrong. But like you, when I add things together, I just get a bad feeling.
I never think that he's either false or genuine either, because like us, he can't be being either of these things ALL the time.
It just seems that when he's less concious of himself, I don't see a good side to him. For example last night when he thought the wrong tape was on. he just basically panicked in what seemed to be pure desperation and self-preservation, he really seemed to think that he was evicted.
One thing to add to that. At that split second of panic, he didn't seem too heartbroken to see his family, he was more concerned that he thought that HIS tape was being played.
It was only AFTER he realised that it was the correct video, that he started going on about how hard it was for him.
Anyway, I suppose it's easy to speculate, because we seem to have more additional info. about Jonny.
I suppose that if any more personal information about other contestants cropped up, we'd change some of our opinions about them too.
By the way, the incident when Jonny thought that he'd been stitched up with the wrong tape playing, and his immediate reaction. Was one of the comedy moments of the series for me.