When I arm a track to record, it takes input from the master out, in addition to the sound from the selected input (a mic), and the sound from another input (a guitar). here's my in/out settings in Live:
original drum track's "Audio To" set to Master
Master's "Master Out" and "Cue Out" set to 1/2
armed recording track's "Audio From" set to "Ext In" and "3" (the mic)
.....
Well, I figured it out. By setting Patchmix DSP to the default for multitrack recording, it solved the problem.
I would delete this post, but doesn't seem like I can.
Dave