I've attached a screenshot from the web trading platform for daily options on the Australia 200. Over on the left you can see the index level for the Australia 200 is at 5943.4. But then on the right, on the options dealing screen, the index level is written as 5915.13. That's a pretty big difference. I'm guessing one of these two numbers is not what I think it is. Can anyone explain which number is correct and why they are different, or this just some sort of temporary bug? Note, I took this screenshot on 2020-06-30 at 10:45am Sydney time.
Cheers and thanks in advance to all responders.
EDIT: I forgot to add, this is the live platform, not the demo. So I would not have thought this was a 20-minute delayed data issue...