Like req has posted above, it is likely a bug in the archiving process and has likely been there since it was upgraded/transferred to internal hosting.
Looks like at least AB news isn't archived across all servers.
@Derrick, there is nothing special, SOs are FIFO. If you're next in queue and if goods hit where market price <= the price of your SO, then you will buy whatever you can based on the amount on sale or if you have enough $, and if your SO was not filled, you then move to the end of the queue.
If you'd like to test it, give me a ping and we can create some FFA countries.