Ok - what am I doing wrong?

WinAmdTweak.exe -i 0 --current

gives the settings for all GPU's instead of just the first one.

I also tried:
WinAMDTweak.exe -i 0 --rcdrd 19 --rcdwr 4 --rc 35 --rp 13 --rrds 4 --rrdl 5 --rfc 148 --REF 15600

and instead of applying it to the first one it did it to all GPU's.  I dont think the -i flag works in this usage.