destroot and (build && destroot) yield different results

[Marcus Calhoun-Lopez]

A few days ago, I submitted a ticket outlining situations in which it  
takes two runs of the port command for correct installation (http://trac.macosforge.org/projects/macports/ticket/14687 
).

Is this a known behavior?

I have attempted to track down the problem myself, but it has been  
slow going as I am not well versed in either Tcl or the MacPorts code  
base.

Can anyone offer suggestions as to which parts of the MacPorts code to  
look at to determine why "port destroot" and "port build && port  
destroot" might have different results?

Thank you,
Marcus