1) What is the story with the groundspeed?
Sub-jetstream = An unusual meteorological event resulting in extreme lower level winds!
2) Shouldn't you be applying a right track offset like everyone else instead of a left one?
If everyone offsets to the right - I like to go left to be different.
Dr 
PS: An alternative explaination might be that the mad Dr, being a bit of a smartar*e, used a GPS simulator program to produce the Jepp FliteDeck output illustrated. Said program may have required the Dr to input the waypoints in whole degrees to five decimals, and the Dr was too lasy (or incapable!) to do so, resulting in a slightly offset track.
It does however illustrate that you should not believe everything you see in PPRuNe!