If you delete the PPOS then the flight plan will sequence one waypoint up. Whilst I can't see it being an issue for a missed approach it very well might muck things up if you are doing an RNAV or managed NPA. Its best to extend the centre-line from centre fix waypoint/start of descent once you are under radar vectors so that the flightplan is all correctly sequenced.
Last edited by Blinkz; 4th September 2012 at 20:22.