Paying Tax via HMRC website -Locked out

It is not stated on the HMRC web site but when paying by card via HMRC.gov.co.uk / Pay now- you can only make 2 payments and then the system locks you out for 24 hours. That is even if you are using it to pay different taxes or accounts for clients. It is supposed to prevent fraud, I think this prevents amounts being paid and in turn delays payment if more than three amounts need paying at the same time. The main thing here is to plan the times so that dead lines do not pass and thus incur penalties. A less efficient manner of paying your taxes online is via your own bank or simply call the HMRC but getting an answer sometimes over the phone is very time consuming. Its better to be prepared on how a system works than be faced with a lock down thinking your card has been refused.