The Highland health board was unique in its adoption of a lead agency model, which gave different powers to each authority.
A report outlining the extent of the overpayments was put in front of councillors at an audit committee today.
Councillor has said local authority must lead by example and more training needed
A battery energy storage system near Mybster has been approved by Highland Council planners, despite environmental concerns being raised.
A site close to Dounreay being considered for a battery energy storage system is one of two in the Highlands to have sparked concern among councillors
NHS Highland is forecast to overspend by £50 million in the latest projections discussed on Tuesday.