Nightmare bug today

I uploaded 6 batches - 23 orders in total today at 15:06pm
Click & Drop Destop downloaded all the orders into the Labels/Watch folder as usual with the correct filename(Order reference) e. 308150.pdf, 308151.pdf etc

But when I opened each pdf they had a different customers label in the pdf.
It turned out that all the pdfs in each batch contained the same label from one of the customers.

That explains why I only had 6 correct labels out of 23 orders uploaded in 6 batches.

The csv Results and Processed files all look fine.

Please can you fix this urgently