Ra did track this. He worked with graphs of how Type incarnates over time and pointed out that the shares fluctuate, sometimes dramatically, across nodal and Pluto cycles. He mentions a sudden rise of Manifestors coming into the world around the present nodal cycle. That is as far as Ra went, and he mentions it only once. The family or playgroup you are looking at is far too small a sample to show anything of the kind, so a run of Projectors among your nephews and nieces is chance, not a trend. And whatever the statistics do, each of those children still lives by their own Type and Authority.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
Free, no account and no email. Every answer here was written by hand from what Ra Uru Hu left behind, not generated. Ask your own question at The 2027 Oracle.