Trying to record only NEW episodes

When choosing tv programs to record, I always select to record only "New episodes," yet for every tv series I record, I get many, many past episodes on secondary channels.  I have deleted and re-added the recording request many times, making sure that I am choosing "New episodes."  I see that this problem was reported a few years ago and the solution provided is always the same...."Make sure you are recording only new episodes."  This problem has obviously not been remedied.  Is there a way to ensure only NEW episodes are recorded?  I am sick and tired of having to go into my recorded episodes and deleting all of the not-new episodes that have been recorded or deleting them while they still show up in the "Upcoming" category.  Please help before I decide to change services.