I feel for you mate.
I was in heated discussions with Virgin agents two years ago about this, being in ADL I suffer the same fate, it is farcical.
For example:
ADL > SYD > LAX in Y is 44,800 points (exactly the same amount as SYD-LAX on its own)
ADL > SYD > LAX in J is 95,500 points (exactly the same amount as SYD-LAX on its own)
SYD > LAX in PE is 71,000 points
yet if I want to include ADL > SYD in Y due to PE not being offered they want to charge me an additional 11,700 points, thus making
ADL > SYD (Y) and SYD > LAX (PE) 82,700 points.
Why you cant cross cabin to a lower class if the higher class isnt available for the higher price is mind blowing, every other airline allows this!
Also how bad is J availability across the pacific at the moment! It's like winning a lottery.
I have 1 million VA points, but they just seem useless.