If a calculated metric is used within another calculated metric, the nested calculated metric does not retain a link to the original. Instead the nested calculated metrics is a copy of the original. This means if the original calculated metric is changed the nested calculated metrics is unaffected.
Caculated metrics 'A' is nested in Calculated 'B'
Calculated metric 'B' actually contains a copy Calculated Metric 'A'
When the original Calculated Metric 'A' is changed the copy within Calculated metric 'B' is unaffected
Therefore, when calculated metric 'A' needs updating it is necessary to change the original metric and every copy individually (inefficient)
Please can you consider making nested calculated metrics retain a link to the original to prevent us having to make changes in multiple places?