I call this issue “it don’t make cents”. Not meaning to pick on Moreton Bay Council or anything, they just happen to be using a payment system (NAB Transact) that contains this problem.
In this image you can see that the “Amount to Pay” field contains a separate box for cents. God knows why this is necessary, and brings to mind the possibility that some people might carelessly type “5” there expecting it to be interpreted 0.5 - i.e. fifty cents (after all, that’s how I usually enter it in Excel spreadsheets). However, it could also be interpreted as five cents.
Fortunately, the system includes a validation script that prevents single-digit cents from being entered. But if they’re going to check it anyway, wouldn’t it have been easier just to have a single field for “Amount to Pay”?
Maybe there is a legitimate reason why one might need to separate dollars and cents; please do enlighten me if you know of any.