you are correct....chicken should not drip on meat.....
and yes much debate on how to cook da brisket...fat side up or down
what to put on top and then on bottom rack....well it just makes more sense to put butt on top.. .much more dripping from that...second....the butt doesnt really need any more fat on it...the brisket can always use (only can imagine)
This just happens to be my favorite cook. I put the brisket fat side down on the bottom rack and let the butt baste it.
This has always worked well for me. The only 2 times I had a dry brisket I did a brisket only. Now days if I am doing brisket I am having pork butt also. wouldn't have it any other way.