How come dave is least favourite to go next eviction yet so far down on overall winner

Although there's a relationship between likelihood to win and chance of being evicted, they are often not particularly correlated. One is a positive and one a negative vote, for example.

Before Sam got in i quite fancied Dave being value as top male.

From DS may give a clue,

1.01 p.m Dave enters the DR and asks BB if he can send a message to his followers. The lights in the DR start to flicker. Dave starts chanting "666 is my number" as his head slowly revolves around 360 degrees. BB asks Dave is that it, Dave says thank you to BB and leaves the DR.

1.10 p.m In the bedroom. Dave asks Steve if he knows what a shill is and tells him with his unique abilitys he may have a job for him. Steve looks uncertain, Dave then tells him it will mean full time employment, Steve breaks into a run into the garden.

DO you theres any chance dave could win, or has corin got it in the bag.

I did see Dave as more a contender for top male more than a winner, i dont like the look of mario/andrew/steve or JJ2 so by an elimination process that only leaves JJ1 sam and dave, its long odds on that the top male will be one of these three. But they are always up for eviction ( or we assume Sam will be next week!! ). Its the fact they might be up against each other that makes it dificult to call. Sam will have a lot of appeal to the JJ1 fanbase, i think he is the biggest danger to Corin.