ABN AMRO BANK Applying Penalty on Customer Account due to their Own Mistakes

I have deposited a Cheque in the account for clearance on 17th April in NOIDA Branch. At 20th when I view the account statement online, I came to know that Rs 112.24/- have been deducted due to returning of Cheque for REASON OF POST DATED.

After doing bank by phone, I came to know through the Customer Care Staff that banking staff does not really check the date of check weather it is postdated or not.

My question here is, If bank is not doing this checking service for us, then why applying penalty charges on my account? As this error can be stopped at the Bank level itself by ensure proper verification by staff member itself.