Margin calculator showing different results then actual trading window

I was trying to check margin using margin calculator and I found the below discrepancy.

I tried below option -
BHEL PE 80 expiry June month

Margin required showing in margin calculator - Rs 1.67 lakh (screenshot below)

Margin required showing in actual trading - Rs 2.54 lakh (screenshot below)

This is too much of a difference, I am not sure if there is anything else that I am missing. Please let me know