I was reading all these posts and im confused as ever. My father was aprroved for both ssi and ssdi. Our lawyer says he won't get the SSi becasue he will get to much in ssdi. Now i see that SSi back pay is broken up. Is SSDI the same will that be broken up as well?? I got the letter stating that his 1st payment will be sent next month.. When should he recieve his back pay?? Is that another waiting game?? Also how much is the cap on ssdi to cancel out his ssi? Im 22 going through the fight of my life.. Stayn strong for him I don't want him to think I can't handel this.. my father has complete trust that i'll do the right thing in handeling this.. when he asks these questions i have no idea what to say.. any help would be great thanks so much!