Whilst there will be a standardised loading for every a/c type, flight deck often issue their own specific loading instructions. It wouldn't be the first time a skipper has ordered a particular loading plan that was completely wrong, yet in trim.
I remember an Islandsflug B737-400 captain issuing a completely incorrect loading instruction because he didn't know how his holds were numbered. Result - a 1200kg misload favouring the forward hold over the rear, and only noticed by the handlers in the next destination. The airline tried to blame the handlers for that too.
It's all well and good blaming the Circus, but do you know for sure it was their fault? Us pilots may believe we are infallible, but we are a very long way from it.