I did have about 40 timers all setup on the Hopper itself.  (We had about 60 timers on the 922).  Was going through my last 20 timers to setup, and I started to get the max timers message.  I started to delete some shows that recently had season finales, and then attempted to add these other timers.  I still could not add these timers.  I am guessing since these particular shows are kids shows, they are repeated several times over several channels.  Even though I only want to record new shows, the DVR sets events for skipped shows too.  (e.g. Victorious)