edits being saved to original document even after saving as a copy

I have created a fillable pdf document for maintenance department work orders. Maintenance staff will fill out the fillable sections and then have customers sign their signature at the bottom as well as their own signature. I have figured all of that out. However, when I save this document as a copy so that I can save it in the appropriate folder, the original copy also saves with the edits that were made. I need the original copy to remain blank so that maintenance staff can return to it each time they need to start and fill out a new work order.