Guys thanks for the feedback.
I'm so sick of this inconsistency of the parking charge.

So much confusion in their system.
I usually enter at 6.30am and exit 7.50am.
Autopay machine charges me RM2.
But guard house would charge me RM4. This happened endless times already.

Called the building manager to complain that day and he was explaining there is nothing wrong with the guard house. It is RM2 per hour from 6am to 6pm.
6.30am - 7.50am  should be charged RM4.

So why is the autopay charging me RM2???
I'm going to try the autopay again tomorrow morning and snap a picture to show the manager.