No - it's just that, by the sounds of it, your machine has now fallen into the 'Reliable' class - and thus, for those particular projects, you can 'go it alone'. Occasionally, the system will automatically 're-evaluate' your machine, by forcing a 'Pending Verification' WU (i.e. another WU which will be sent to someone else's machine in order to double check yours).

Zero Redundancy, is the most efficient way of crunching - as the scientists are confident that the results which they're getting back, are correct and valid by only having them crunched once.