Teacher: Found items, Mark, No mark, My found items, Returned to owner

In the Lost and found module there are several tabs in the top menu.
Found items - a list of all entered items found
Mark - a list of items marked by at least one person as their property
No mark - a list of items that have not been marked by anyone as their property
My found items - items entered in the list by you
Returned to owner - items that have been reunited with their owner. These items are not listed in the list of found items. The students and parents donpt see them in the list of items found.