Hi,
It seems to me that the four graveyard EB can have a "wild card" effect on any chart. When clashed open, the chart may function quite differently than it did before and so, perhaps the more such EB one has in the chart, the more erratic their life seems.
Or when one hits a luck cycle with one of these EB, then if a year or month clashes it open, it might be a "new ball game."
What do you think?
Robert