My theory is that in the first timeline Joe probably goes to France lives 30 years doesnt meet the asian chick gets caught sent back and k!lled
2nd timeline hes influenced by Abe goes to China instead meets the asian chick whose death influences all of old Joe's decisions goes back to k!ll the rainmaker (the asian chicks death wasnt a plothole to me because it was accidental and they had to burn sh*t down to cover it up. The job was to close the loop so they proceeded to do it because i guess it was procedure)
3rd timeline Young Joe doesnt k!ll Old Joe this is mostly the events of the film Young Joe's influence on Sid were pushing him away from his rainmaker path so Old Joe unbeknownst to him was setting him back on the rainmaker path (there was no way the mom couldve saved that kid on his own he probably would have k!lled her by accident). Had Old Joe k!lled the mom and Sid got on the train neither Old Joe or Young Joe wouldve found Sid he wouldve became rainmaker and Young Joe wouldve eventually had to flee the country after all that happened, most likely went to China met the asian enter 4th timeline. Young Joes actions were pretty bold and fixed the timeline.
btw im high as a kite