I posted this back in December, so we have been over this already and rather recently. I think my interpretation of events surrounding the phonecalls makes perfect sense - as much sense as anything anyone might come up with. Here goes:
I think that Jeremy called Julie because he didn´t know what to do. He might have called her before he called the police. I interpret his call like this: He was insecure about what was happening, perhaps there had been incidents with Sheila before (well, we know that there had), and they had been settled within the family. Jeremy would have been unsure what NEVILL WANTED HIM TO DO. He had just asked him to come to the farm, not to call the police, so Jeremy called Julie.
"Everything is going well" meaning, I am OK, (but) "there is a problem at the farm (what should I do?)."
Julie, stoned: "Go back to bed."
Jeremy, now on his own, afraid to go to the farm alone, afraid to call 911 - it could upset a very private Nevill Bamber. He decided on a compromise: the local police, perhaps that would upset Nevill less than a 911 emergency.
That way the whole thing makes some sense, because taken out of this context, it just does not make sense to say: Everything is going well, something is wrong at the farm. And then Julie: go back to bed. No sense.
