We had an invoice that we noticed was printed and posted with a freight of $29,000.00.  There should have not been any freight charges, just the total of the 12 parts at $179.00
 
I voided the invoice and got an message that the invoice was going to post with an amount less (-$179.00) than the original amount an would be skipped.  I looked at the aging for the customer and the original amount was still there.  I tried voiding it again and it said it had already been voided.
 
I noticed that the SO is now re-opened and there is an additional line item duplicating the first line but with a negative qty and a negative cost of -179.00 which should bring the SO to a zero balance but it shows as a credit.  If I print the invoice from that SO it prints as a credit memo of $179.00 but shows no credit for the freight.
 
So...totally confused on what to do.  Voiding an invoice is usually no problem.  
 
So to summarize...
I voided the invoice but it still shows on the aging.
I tried to void it again and it says the invoice has already been voided so it cannot be voided.
The original SO is now re-opened with the original line item qty and $179 amount and a duplicate line item (not added by me) with a negative qty and negative cost which should total zero but shows as a credit of $179.00
 
Any ideas what to do at this point?