I changed the start channel of all unused channels on the "string ports" tab to 26167, which is the lowest channel used by the models on the F16V2R.
I'm still having the issue where the channel on line 11 gets changed from 32797 to 32. It's totally random, though. Sometimes when I click the "E131 Configuration" tab everything is correct. Then if I click another tab & return to the E131 tab, it's changed to 32 and everything is "red". If I click the tab again, sometimes it stays changed, and sometimes it displays correctly. It's very strange. the XML file always seems correct, though, which is good.
The good news is that all my models seem to be working now. I found a couple of issues with my wiring, so I'm not sure if the wiring was the fix, or if it was the channel changes.
Just thought I'd post my results in case anyone else runs into this.
Thanks again for the help!