That was the original design intent, but the wording on that proved tricky, so I punted to “to as many different lands as possible”. The example you give is perfectly correct for 4 Explorers, but if there were 10, while each of the 3 adjacent lands would need to get at least 1 Explorer, the remaining 7 Explorers could be split up as desired. (0-7-0, 2-0-5, 3-2-2, or whatever.) It’s slightly more permissive for the Spirits.