'sales_flat_order_grid' shows wrong data

Question

In my clients store there are 4 orders that are displaying wrong data, all four consecutive orders are displaying the same billing and shipping name in the order grid, all other data is correct.

I've gone through all 3rd party extensions and none seem to mutate that table so I guess the issue originates from somewhere in the Magento core code. I was wondering if anyone else has ever encountered this. It's only those 4 orders and in the order grid, orders after them have not had this issue and invoice and shipping grid do show the correct data.

Answer 1

I tracked the issue down after a lot of debugging to a 3th party using the WSDL API. Actually I had my suspicions but I needed some proof so build a couple of custom loggers that checked for the data send via the WSDL. So no issues in Magento, just 'human error'