I'm not sure if I missed something but I am not able to select the clone campaign in the episode 2 menu I can select the separatist campaign though. Is it something like I have to beat the game first (and I just missed this because I am stupid) or is this like a known issue? Any help would be appreciated!

This appears to be just a temporary glitch. I tried starting the game for the first time on this computer and could not pick it. After the restarting the game I could choose it though.