Your system information

• Steam client version: Latest stable as of today
• Distribution (e.g. Ubuntu): Ubuntu 16.10 amd64
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Steam only shows that I own: Killing Floor - Community Weapon Pack 1,
when in reality I also own the Killing Floor - Community Weapon Pack 2
and Killing Floor - Community Weapon Pack 3.
It shows on the respective steam store pages that I own them, and I can use them in-game but
there is no option to disable them, in the game properties and DLC tab, it only shows pack 1.

Steps for reproducing this issue:

1. Have the mentioned game and DLCs
2. Go to the properties of the game and DLC tab
3. It will not show all DLC own