You may find that when you have an existing element that you want to amend in a purchase workstep using the green pencil, adding a change date to the Dates tab and confirming everything, the original date still appears on screens.
When you complete the step and open a new step, you will see that on the Provision and Contributions tab, the original data is still there; however, when on the new step, you drill into the pencil again and visit the Summary and Dates tabs, you will see the latest change date is reflected as amended.
📌Note: When a major change is made, say to the purchasing team or budget codes, this has a definitive change of dates to all screens to the new one.
So how best to process the date change to take effect so that it persists to all screens is to use the Care Package Adjustments screens via the care package screens to make this change of date so that Mosaic makes sure that the date shifts to the new one, a new PO revision is created and all the related dates in tables such as element details and occurrences are updated.