Nifty 50 index value changed after closing time

I was checking the Nifty’s value around 3:22 PM today and noticed that it was a few points above 10550.

Upon checking 10550 CE (for 2nd July) price, I noticed that was trading at less than 1Rs

Thinking that I could profit from this difference, I bought some of those Call options

Then at 3:29 PM, I noticed Nifty was above 10560 but the Call options prices were still trading at less than 2Rs

Thinking that I could profit more, I bought even more of those call options

After that, when the market closed at 3:30 PM, Nifty closed at 10562 (screenshot attached below)

Initially, I thought that I had made a profit but after a few minutes past 3:30 PM, Nifty’s value changed to 10551.7

The thing that puzzled me was that even the chart in Kite shows the closing at 10562 (screenshot attached below). I mainly wanted to ask why after 3:30 PM, the value of Nifty got reduced by 10.3 points?

I am new to this, so I think there is certainly an explanation for this phenomena

See Bank Nifty Weekly Options. How Price Calculated.?

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