Buster - manual load and trim systems never had an allowance for lateral fuel load discrepancy from DHT right through 727-276- I would be interested to hear if the computerised systems allow for this.
Load control is generally worked on a passenger by zone theory, and a good loco will ensure the forward and rear zones are filled first and the no-trim zone above the MAC filled last. I am sure todays flight editors are capable of this.
One can only imagine late cargo or a misload by the bag snatchers caused this - or the systems are not as good as we thought.
Best all
EWL