Transactions prior to a date not reflecting correctly?

We have a problem on our manager. When we click on bank transactions, all transactions prior to 31/03/2018 shows a zero balance, but if you click on the transaction the amount does reflect. The dates prior to 31/03/2018 also reflect in red. How do we correct this?

First, if your version is still showing the Bank Transactions tab, update your software.

Second, please describe exactly where you are looking and illustrate your problem with screen shots.