text: actually,
  https://www.openstreetmap.org/node/369762858
  shows there probably was a mass alignment shift as the building is on v1 while the node is v2.
  this could explain why the markers are now offset from the building poi centres - and is something i have to keep in mind.
  this is certainly too far from AGIS territory to be included in their slight overspill of a km or two aerial coverage...
  wonders if a quick glance at a forbidden source would clarify matters...