No, you're not misunderstanding functionality, just how I was using the SMS. I just need to change the way I use it. I used both the SMS & the notification feature (one as a "hey, don't forget this is today/tomorrow" & one that was just a reminder allowing time to get from point A to point B. The SMS would automatically wakeup my phone & the different notification tones helped me know what was going on without having to turn on, unlock my phone. So, now, I've installed another app that wakes up my phone & have had to go into all my calendar items & change each reminder/alert individually. A hassle I didn't have before. Less security for me to remember appointments.