Just to set the geography straight, the System's Probationary Nursery is located on Transition World number one (the Finaliters World). The Seven Mansion Worlds are satellites of T1. Each of the seven Transition Worlds has seven satellites, and all 56 revolve around Jerusem, the System's capital.
As I understand it, resurrection occurs according to the standing of the individual at the time of death, psychic circle attainment and seraphic guardian assignment (see Paper 110:6 The Seven Psychic Circles).
There is this in Paper 49, about the resurrection of children:
49:6.11 (569.6) 3. Mortals of the probationary-dependent orders of ascension.
The arrival of an Adjuster constitutes identity in the eyes of the universe, and all indwelt beings are on the roll calls of justice. But temporal life on the evolutionary worlds is uncertain, and many die in youth before choosing the Paradise career. Such Adjuster-indwelt children and youths follow the parent of most advanced spiritual status, thus going to the system finaliter world (the probationary nursery) on the third day, at a special resurrection, or at the regular millennial and dispensational roll calls.
And this about resurrectees in general:
49:6.9 (569.4) Throughout the earlier ages of an evolutionary world, few mortals go to judgment on the third day. But as the ages pass, more and more the personal guardians of destiny are assigned to the advancing mortals, and thus increasing numbers of these evolving creatures are repersonalized on the first mansion world on the third day after natural death.