Credit Information Bureau India [CIBIL] — Credit Score - System Error

I have an overdraft account and there is no outstanding balance. I rarely use, this facility and square of the amount drawn within a month. To avoid any negative balance, a balance of few thousand rupees was transferred to set off any charges, if the banker charges in the subsequent month.

I was surprised to note that credit score came down drastically because now I have positive balance in my overdraft account.

How can an organization like CIBIL have such errors in their system. Please correct such errors in your system.