Actually I know why they appeared. I deleted the Default Gun ( which was needed ), then after I put it back, I found the guns there. Same with TF2 Melee Pack. I needed the Default Sword which I deleted, and when I putted it back I found it. I found this out by looking in the console.log. It happens when packs don't have all of what it says. My JVS Door Mod doesn't have Security Door, Manhole Cover, Rolling Vault Door, or Double Wooden Door. I have same problems as you. Packs don't show all of what it has, in my case.