I appreciate the complete details you've provided, @Novice338.

You may have enabled the Received Status column. Let me guide you in customizing your purchase order template.

1. Go to the Lists menu.
2. Choose Templates. 
3. Locate the Purchase Order you want to use.
4. Click the Additional Customization button.
5. Select the Columns tab.
6. Make sure to remove the checkmark for Received Status.
   • Also, make sure that there's no Number or Order assigned on it.
7. Click Ok. 

Also, you want to make sure to remove the checkmark on the Print Status Stamp tick box. This will display the Received Status on the printed purchase order.

On the other hand, you can open your past purchase orders and manually change the template used on it. From the Purchase Order window, just click on the Template drop-down. Then, select the template you want to use.

You can refer to this article for more detailed instructions about managing your templates: Use and customize form templates.

Keep me posted if there's anything else you need. Have a good one.