Thank you, we resolved the issue directly with Databricks. It seemed that the storage configuration limit was not tiered (i.e. 55 per account regardless of the account type) a few months ago but has been updated to be tiered as now seen in the documentation (3/11/55 depending on the account type) so the 55 limit is only available for enterprise customers.

We are also considering consolidating the audit log buckets to reduce the number of storage configurations needed.