Seems that you've understood wrong how those id-jumpers work. Those drives you have allow ID (LUN) 0-7. Some drives have those jumpers marked as bits 0,1,2 (and 3 on uw) and some as values 1,2,4, but they both work in same way. If there isn't no jumpers, then the unit is on id 0. If you put jumper on first place (marked as 0 or 1) then it's unit 1. On second place (marked as 1 or 2) it's unit 2.. and on third it's unit 4. Then you can use several jumpers and count the values of them together... like putting jumper on first and third place gives you 1+4=5 and putting jumper in all three place gives 1+2+4=7.
Maybe your problems are because you have set accidently two devices for same id.
