Hi
I would expect error'd seconds during a resync, as that counter is counting each second a problem is seen during that period of time, and having no sync at all is considered an error, as the normal status quo is to be sync'd.
Some firmwares may reset that counter after a re-sync, but I think that is wrong as it then mis-reports 0 error'd seconds, when in reality we might have been sat trying to get to a web page for the last 30 seconds and failing because it was re-syncing. A re-sync is a big error in my book, I'd expect it reflected in the stats.
Regards
Phil