I have encountered a new 'feature' in the latest update, perhaps it existed in the other versions and I just missed it. In any case, I am not fond of it.
Set a recurring timer ('event 1') on channel A for 7:00p to 7:30p padded 1E3L (1 minute early, 3 minutes late).
Set a timer ('event 2') on channel B for 7:00p to 8:00p padded 1E3L.
With both of these timers set, create a new, one time event timer ('event 3') on channel A for 7:30p to 8:00p padded 1E3L.
The 721 strips the 3L padding off of 'event 1', and strips off the 1E padding off of 'event 3'. This would be a nifty feature (maybe) if it did not strip off the padding for the subsequent 'event 1' events (i.e. it permanently modifies the timer's padding)
-Chad