Perhaps these are actually the two main branches of the tree, the first one being what happens with a "nice" creo (Buz, etc.) and the second is what happens with a "not nice" creo (archie, etc.).
Actually I would say the tree has 2 main branches both with 2 sub branches. At times some on my side (evo) also show the archieish form of niceness.
As for lurking. I was a lurker for about 1 minute 10 seconds.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008