Weird thing happened to me when I hooked mine up today. I used the orange wire because I'm weird about numbers and wanted the first input into the XCAL to be input #1. Well, it showed up as number 2 on the XCAL. It logs fine, but it was just a bit confusing when I went to set it up as analog 1 and it read a flat 10. As soon as I set it up as analog 2 (which should have been the red wire) it worked fine.
Also, for anyone wondering how to hook up a 2nd 02 sensor on an aftermarket header, I go into explicit detail here:
Wideband A/F Gauge Install With FSwerks Header