only easy and expert difficulty ?

hi,

after installing custom song pack i can play in career mode only on easy and expert.
easy has 1 song, expert has 2 if i remember correctly. is that expected or did i fucked up along the way ?

ok i know that i have to input cheat to get the rest of the songs available in quickplay,
but can i play them on medium in quickplay mode after the cheat ? and in career ?
because easy is way too easy and hard/expert are too hard for me now.

regards and thanks for all the work