I'm gone mad with this bug.
13w10a release still has this bug. I think this ticket is valid and shouldn't mark as duplicate.Since MC-8022 is in last version (13w09c)and marked as fixed. But this bug occur in 13w10a which isn't the same bug.
Sorry that I didn't check other report. But of cause it's going bad to update the comparator manually . Mojang must fix it since many automatic system use the comparator.
Well. But it look very weird if you create a mega huge system but you MUST update the comparator.
Can't reproduce. More condition?