What are the steps to reproduce your problem?
1. Create a collection
2. Create two reports
3. Add both reports to same collection
4. Notice that the reports within the collection are sorted by last changed, but the last changed report is the last in the list.
What is the problem?
Sorting is wrong.
What would be the expected behavior:
Actually the last changed report should be the first one in the list, same sorting as we have for reports and dashboards below.
Meggle mentioned in backend we do not sort this yet.