Thank you, Rad!
The first question is clear to me now.
The second question, I don't think I have expressed it right. I will demonstrate it on an example. In synastry, person A has Venus on the North Node and person B has Venus on the South Node. What would that imply (in this same case where the nodes square each other) ?
And since you have explained the situation when one persons planet falls on the other persons node as representing the dynamics that have brought them together, how would that situation be modified in this same case again where the nodes square each other? That would mean that the dynamics that brought them together are at the same time their skipped steps. I find it hard to imagine what that might look like. I assume these skipped steps would be a major cause for the ending of that relationship, so what brought the people together was also what tore them apart?
This type of signature correlates to dynamics that have brought the two together in the past, Venus conjunct the S.Node, and as that relationship was then developed around those dynamics they became limiting to the ongoing evolution of not only each individual, but also to the evolutionary growth of the relationship itself. Accordingly one of them then tried to evolve the relationship forwards, Venus conjunct the N.Node, that then had the affect of creating resistance in the other person. This resistance over time then created a state of maximum polarization between them, the meaning of the Venus on the N.Node from one to the other, and the Venus on the S.Node from one to the other.
Efforts would have been made by each to move towards the other relative to these polarized dynamics without either of them actually embracing those polarized dynamics that needed to be evolved. It is the trying to embrace the new dynamics that would allow the individuals, and thus the relationship, to evolve without actually being able to do so which then results in the skipped steps symbolized in the squaring Lunar Nodes. It would be like saying let's agree to disagree and then trying to keep the relationship going anyway. Evolutionarily, with this type of signature, the Soul's can not just try to keep it going anyway because that has lead to the skipped steps.
God Bless, Rad