How do I change the format of the date of the signature to normal DD/MM/YY, not in the very illogical MM/DD/YY? Many of our clients are wondering if the dates are wrong.

If you are referring to the automatic date/time stamp that occurs when using the "Date Signed" field, then this is controlled by a DocuSign Admin setting. It can be located by a DocuSign Admin under, Signing Settings, then locate "Document Formatting" section and change the "Current Date Format". Save.