The tab filters on the left-hand side allow for quick sorting, sorting the records by their categorised types.
By default, all tabs in your My Items are selected.
If you wish to view items just from one criteria, you will need to deselect the other tabs.
e.g. If you only want to see lessons, you will need to click on all the other tabs except the lessons tab. It will now only show lessons in your 'My Items'.