Why not all of my Cold Storage selections are being backed up to Cold Storage?

This is due to the fact that beside selecting those files from the Cold Storage tab, you have them selected from one of the other tabs; the Smart Selection and My Computer tabs.

C-Cloud gives a higher priority to the Instant Storage (applied for selection from the Smart Selection and My Computer tabs) than to the Cold Storage.

To solve this issue, remove the selections from the Smart Selection or My Computer tabs, and only select them under the Cold Storage tab in the C-Cloud client on your computer or in the policy.