Self adjusters keep overtighten

10" drumbrakes. 8 3/4 rear, 1970 Duster. The rear came from a Barracuda though. I think it was from 68 or 69. Everything is new including the cylinder. I have checked and double checked that I installed everything correct. On the rear passenger side it seems that the self adjuster overtighten so the brakes drag and get hot. I remove the drum and back it of and it's all fine for many days. But then it drags again. Only on the passenger side. I forgot to takes pictures tonight. Any thoughts?