Zerodha — Regarding deduction of extra funds even after getting profit

My client ID NG8684

On 2nd day of trading i open trade with 963.52rupees on 1Jan 2021 in MIS and booked profit of 19.9 rupees but even after deduction of your brokerage charges of 13.6 rupees I was in profit of about 6 rupees with total net funds of about 969.60 rupees but now my funds are 949.90 rupees...which is about 20 rupee less Can you guys explain is there any hidden charges and why did you deducted it
are you doing this to every customer are you trying to grab money away! !!