I rarely play Black Ops 2 Multiplayer without being a second screen. My friend is logged into the PS3, but I'm still playing with my account. He's level 50-something, and I'm 40-something. Anyway, I noticed there was a trophy for reaching level 10, and I don't have it. I realize that it was because I reached level 10 while linked through someone else's account. My friend has it, but I don't; also, I'm much higher than 10. Can this trophy and others possibly like it still be obtained for me?
EDIT: I tried playing a few rounds by myself with me logged in alone, and it didn't work.