Why is brokerage charged multiple times under the Trade Free plan when a single F&O order is executed in multiple trades?

Under the Trade Free plan, brokerage of ₹10 is applicable per executed trade for all Intraday and Carry Forward F&O transactions. If a single order is executed in multiple parts, brokerage will be charged separately for each execution.

Example:
A short sell order of 750 quantity in Nifty was placed, followed by a buy order of 1500 quantity. Since the buy order was executed in two parts, brokerage of ₹10 was charged twice — once for each execution.