All that anyone cares about surely is what you have when they are 999ft apart (assuming the vertical sep is 1000ft). In the Oz college of knowledge there was the old "Separation assurance" thing they used to get you on, but in the real world that was always a bit of a joke.
So my answer is you either have a sep loss or you don't. There is no such thing as a technical loss of sep. In this case they are 8,000 ft apart so until they are 1000ft apart whether they are .5 NM apart or 25 NM apart is irrelevant. Just my opinion, but maybe I have been working in the Wild West Sandpit too long.