It had to be declared if it's scripted. There are rules in place. The producers can direct, as in you three sit here and talk about X, you two sit there and talk about Y, but it's not scripted.
There is also a lot happening we don't see, which is why things appear to come out of the blue.
Jordan's behaviour isn't so out of the realms, read the relationships board. There are threads occasionally from women who have been with a man, have the exclusive talk and then he goes cold and backs right off. Everything just happens faster in the villa.