I believe this is what we call the survival of the fittest. Most probably the seedlings germinating on the other leaves or within the fruit coat wont survive for long. The plant is usually adapted for wind dispersal but it may happen due to abrupt rain.
Why would a seed like to be dispersed like that, i.e., away from the mother plant: The possible answer which I could think is JUST TO REDUCE COMPETITION WITH THE MOTHER PLANT. But indeed this is a nice observation. If possible please keep an eye to check if the seedings can survive for long or if you wish to conserve the species, then you can just collect the seedlings and plant them at some distance from the mother plant. I dont know much about you Mr. Neil, but just in case you are a researcher then you may try to atleast publish this as a short note or wait for sometime to check if they survive and then publish it. It will just need some field observation from your side. Regards Pankaj

