I am surprised either of those showed up - Mental Health arrests definitely shouldn't. Ongoing investigations can show up, but if you say you were cleared of same then it shouldn't.
DISPUTES
If you submitted an application form directly to Victoria Police you need to put your dispute in writing, including a copy your photo ID (eg current passport, driver licence) and any relevant details to:
Manager
Public Enquiry Service, Victoria Police,
GPO Box 919
Melbourne VIC 3001
In order to assist with the confirmation of identity, with regards to the resolution of any disputed criminal history information, you must provide as much additional information as possible. You may also be required to provide comparison fingerprints to assist in any determination however this will only be requested where necessary. No fee will be charged for taking comparison fingerprints.
An investigation will be conducted and you will be informed of the outcome by mail.
If you submitted an application via an interstate police jurisdiction you need to lodge your dispute with them according to their dispute process. Please make direct contact with the specific police jurisdiction.
If your check was conducted by an Australian Criminal Intelligence Commission (ACIC) Accredited body you must raise your dispute with them. The accredited body will arrange for you to complete an NPCS Dispute form which they will lodge on your behalf.