I know. The charge was crazy today.But your real profit in this...

I know. The charge was crazy today.
But your real profit in this case was $119 (based on $216-$97).

Compare IG (first chart) with real SPI futures (second chart), with yellow line showing 4pm.
For IG, the whole night chart is shifted down some 10pt relative to the day session. I think that's how they adjust it for dividend.

So, part of that $219 profit was due to artificial drop of IG Cash chart, and not an actual short profit. So they corrected it by manually deducting $97 off your profit.
Doing the exact same trade at exact same time on real futures, net result would have been the same ($119 gain with no dividend correction).