K1000: 6.2: Software Catalog Discovered Is Missing Items
The Discovered Software list contains few items than expected. For example, some devices are showing 126 items in inventory under Discovered Software, but the Discovered Software list in the Software Catalog only contains 99 items.
The software catalog has gotten out of sync.
Go to Settings>Appliance Updates>next to Software Catalog, click on Check for Update. Allow the update process to complete, and the Software Catalog should show additional items.