Update manager displays all levels update even when visible is not selected

[cne007]

Linux Mint 17.2 Rafaela, Mate 64, 3.13.0-37-generic #64-Ubuntu

I maintain my system up to date only with level 1,2,3. I never apply level 4,5.
When level 1,2,3 updates are available I check what is available in the main windows of the update manager. I always see some of the level 4,5 displayed but not selected as 1,2,3 are.

After the update when update manager refreshes I still see some of the 4,5 level updates.

In update manager "preferences" - "levels", for level 4 and 5 updates "Visible" (V) and "Safe" (S) are not selected. They are for 1,2,3.
Playing with the settings if V+S are selected for 4,5, more of 4 and 5 updates are displayed and selected. So the V+S are working this way.

On the tray icon side, it does not warn me to update when V+S are not selected for 4,5.

If V+S are selected the tray icon immediately updates its status to update availabilities.

Not an annoying situation at all as it's only a cosmetic issue.

Thank you for this great product.