Not and Order and Not an Invoice

I seem to have lost a Sales Order/Invoice.  Can you help me recover it?

When I search for Invoiced Orders, it shows on the list:

When I search for Sales Invoices, it is not on the list

It's also not on any Receivable Reports

When I open the Order, it will not allow me to edit

Anyone have any ideas how I can get my invoice?  

Thanks

Sue