As far as I can tell one can’t usually believe the things that Karzai says. Plus he has to adopt an anti-American attitude for domestic consumption purposes. Plus he’s massively corrupt and untrustworthy so why would the US want to fully clue him in on negotiations. The combination of these factors make it impossible to tell what actually happened based on what he says in public.
good point
Everything you said about Karzai applies to Obama. Every single point.