I think I can explain this. It has more to do with Higgins' attitude towards becoming "Magnum's answering service" than story continuity.ENSHealy wrote:Question: Higgins mentions early in the episode, regarding Thomas' phone, that he "checked with the phone company. It's been disconnected." Later, during the "health food" lunch, he doubles down, saying "At 1:30 the phone company called to verify the fact that your phone has been disconnected." How is it that the phone company tells Higgins not once, but twice, that the phone has been disconnected, when it is later stated that the dogs chewed through the line? I think this is a flub. At the very least, it's a real weak spot in the story continuity?
From the Crucial Conversation above, we see that Magnum has known for some time that his phone isn't working, and has given out not only the estate number but also the Red Phone number to who-knows-all. Higgins says he's taken dozens of calls (although Agatha's call is the first one he has passed on to Magnum!) and he says the phone company told him the phone is disconnected. Now, if Magnum is receiving and paying the phone bills, then the phone line is under his name, and apparently Higgins is able to call the phone company and get information about the line, no doubt because it's on the property for which he is responsible, but they would not give him billing information. Thus he does not know the reason why the phone isn't working, he just assumes it's because the bill is unpaid.
Later at lunch, he says the phone company called him to verify the phone is disconnected. From the phone company's point of view, the line is literally disconnected, meaning... not connected to the system... and they don't know why, so they called Higgins as the property manager, to see if he knew why. And as I said, they still won't tell him anything about the billing because that's not under his name.
We're only getting Higgins' version of what's been said between him and Ma Bell because he's going into it assuming Magnum is somehow in the wrong. All the information he has is being filtered through that mindset, so what comes out is "your phone is disconnected" and not something like "the phone company doesn't know why you can't make or receive calls."
In the end, we find out that the dogs have disconnected the line from the system. Higgins was technically right all along, the line was indeed disconnected as the phone company no doubt told him. But he took that slim fact and ran with it!