It is possible that the volunteers entered incorrect personal or health information. If you found that the volunteer information is out-of-date, please ask them to update their profile or inform StepUp admin.
Please also note that the recruitment area is defined by postcodes which can be across state/territory or local council boundaries. For example, a volunteer whose residence falls under the postcode 4380 can be matched to studies looking for volunteers in NSW as well as studies looking for volunteers in QLD. Also, a volunteer whose residence falls under the postcode 2193 can be matched to studies looking for volunteers in Ashfield, Canterbury and Marrickville. In such cases, volunteers from a different state/area may be matched to your study, due to the overlapping of postcodes. It is up to you to further discuss with the volunteer about their eligibility and enrolment for your study.