Yes your suggestion of 1.9008 miles is just as valid as my 10032.9 ft measure, as you say it's only 3.224 ft out.
So who knows , but for now im still favouring mine and Robin Heath's adjacent figure for the triangle of some 10032.9 ft, then with the heading of 247.4148 degrees it provides the other two sides of the triangle by fixed geometry.
Another reason why i think its correct is what can be found via the combined three lengths of that Robin Heath triangle .
Again there seems to be a Lunar connection in that we can find the Moons mean circumference to an almost exact modern day figure, how they found this figure 4.500 years ago is amazing .
The Moons Mean circumference from Wiki says its 6782.4687 miles
The Stonehenge to Woodhenge triangle will produce that figure to a very high degree of accuracy by multiplying its three sides with each other and then dividing by 5280.