If you are using masked Keyword Types for auto-foldering, note that the Extract Mask Characters and Store Mask Characters settings are designed to store different data in OnBase.
Do not change this setting from one setting to another in an existing auto-foldering scheme. If this setting is changed after folders have been created through auto-foldering, new folders will be created upon auto-foldering documents, even if documents appear to have the same Keyword values as the existing folders.