Seeking solution for inserting backdated Action and deletion of backdated Action

Dear experts,

In this typical scenario, for Infotype 0000:

<-----------------ActionA1----------------->

ActionA1 Employment Status = 1

I want to insert an ActionA2, SAP will allow me to cut ActionA1 and I will have the following:

<--ActionA1--><------ActionA2--------->

ActionA1 Employment Status = 1

ActionA2 Employment Status = 2

I have scenario A as follow:

<-----------------ActionA1-----------------><---ActionB1--->

ActionA1 Employment Status = 1

ActionB1 Employment Status = 1

SAP will not allow me to cut ActionA1 with ActionA2 Employment Status = 2

And for scenario B here:

<--ActionA1--><------ActionA2---------><---ActionB1--->

ActionA1 Employment Status = 1

ActionA2 Employment Status = 2

ActionB1 Employment Status = 1

SAP does not allow deletion of ActionA2 Employment Status = 2

Can you explain why SAP impose such limitations for both scenarios?