Hi @Tracy,
Welcome to the Hubspot Community and thank you for your question.
When you are exporting, are you doing so from a view that you have set up in a portal? When you choose to export, are you including all properties, or just the columns show in in the view?
If you’re able to provide the HubID and walk me through the steps that you’re taking to export, I’d like to be able to try to reproduce the issue. Additionally, if you could provide an example contact that has property values on the contact record but not on the CSV that would be helpful as well.
Lastly, I just want to make sure that you aren’t expecting anything from the timeline on the right of the contact record to be included in the CSV. These are known as engagements, which cannot currently be exported to a CSV.
Brett