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Why not add your ID to this observation? I think you are right, but you can select 'it might be this' as an option and see who agrees with you.
University of Edinburgh and Biodiversity Observatory (OU)
Could you check your 'Dartmoor' location as it is showing up as in the sea. It is best to check each of the observations that use this location and position them individually using the map.
Lat/Lng: 49.9, -3.6
OS grid ref: SX9101