Assistance w/ Interpreting Logs

I’ve looked through this page
http://ardupilot.org/copter/docs/common-downloading-and-analyzing-data-logs-in-mission-planner.html#manually-review-a-log

But there’s still entries that aren’t explained. For example, I’ve got ERR ecode of 2 with subsystem 16. Looking at the page, I see that 2 is radio, but there’s no subsystem listed for it. Similarly, my MODE data is not a string as the site says it should be, but rather 0 or 2.

Is there a definitive spot to find info on all these entries?

Thanks