Have just put the following into the validator:

MRU-LHR-EZE,GRU-LIM,SCL-LAX,YVR-JFK,EWR-PTY,DFW-ANC-ORD-NRT-HKG-DPS,HKG-AKL,CHC-SYD-PER,BME-SYD-LHR-DXB-LHR-MRU

To the best of my knowledge it's a valid routing, however i'm getting an error message stating:

Rule violated!!!! [LHR-MRU] Max 1 segment(s): Ghana/Nigeria transit

I didn't realise i'd transitted Ghana/Nigeria... is this just a bug with the validator? Or am I actually breaking the rules...