I understand wanting to get the bill paid asap, but I would still suggest waiting for the paper statement to arrive and then using the attached payment slip to pay it.

There is usually a deadline date of approx 20 days in the future before you risk incurring any interest, so better to pay systematically, statement by statement, with the payment slip that's attached to each one, rather than jumping the gun and risking using the wrong slip with the wrong bill. As long as you pay the bill in full within the payment deadline every month, everything's neat and tidy, no interest or extra charges. The payment deadline is always clearly shown on the statement.

To satisfy your completely understandable slight OCD re credit cards think of it like this.

Month 1: Transaction(s) -> bill -> payment
Month 2: Transaction(s) -> bill -> payment
Month 3: Transaction(s) -> bill -> payment

and so on

How's that for nice orderly finances?


ETA: Oh by the way, you mentioned you had CS online banking. In the E-bills section, you can register to receive your statements online. That way, you get an email when the statement is produced, log onto your CS Direct Net banking, check the statement (and save the PDF if you want), and pay it online. Same rules apply re payment deadline and interest as with paper statements and paying over the counter.