The sorting order of background data has no particular order not ascending nor descending
SuccessFactors - Employee Profile / People Profile (PP3)
Reproducing the Issue
Employee Profile v12
People Profile (PP3)
There are two types of blocks such as background and trend blocks. The sort order of these two types of blocks are different. The sort order of background portlet/block is based on the order user specified from UI. If you open the edit dialog of background block, you could find there are upper/down arrows beside each record.
The order of the records could be changed using these upper/down arrows. After saving, the order is consistent with the database. Each time these records show in background blocks, they will be sorted according to the order specified. The sort order of background records does not depend on start date or end date.
The sort order of rating/trend block is defined by the system. The sort logic is like below:
descending order of end date
descending order of form data id
descending order of each record id
Therefore it appears that rating records are sorted in descending order of end date in this instances.