Are there two lil cals? I know dirk's is empty, and that's how he seals Lord english's soul. Oh god the lil cal timeline is so convoluted and confusing what even happened

We literally see a timeline of what happens in Mental Breakdown. Dirk’s becomes sealed in the Furthest Ring, from which it is manifested into other realities as a way of spreading LE around like a disease, as we see Gamzee doing by Chucklevoodooing Lil Cal into existence. Dave’s version is eventually destroyed to possess Jack Noir direclty.