Ok, I deactivated mpich and have run
simfactory/bin/sim build --optionlist=osx-macports.cfg >build2.log 2>&1 and get similar errors. I have pasted the contents of build2.log to http://pastebin.com/kcua0vKQ. It does not seem that the deactivation of mpich had the desired effect.
You probably need to do a clean build by removing configs/sim and building again (this is usually good advice in general, if you suspect there is something weird happening with the build system). Having both MPI versions' header files around during compilation might have caused the problems.