keep objects from overlapping
 

I am somewhat new at this can use some help.
I wrote a macro to display a flow chart from data entered through userforms.
The problem is, as you add data, the flow chart changes and the arrows
connecting the rectangles cross and becomes confusing. More so if you have
to add data to an earlier portion of the chart. My biggest problem is that
the chart is generated as you go therefore position of the 'rectangles'
depends on order of entry, not how they are connected in the process. Any
suggestions?