Sorry if this has been posted before but I'm having big issues with my Calendar alerts. When I'm in lock screen and a Calendar alert rings off, it often disappears from notification center almost immediately and if not, as soon as I get another kind of notification (text, email, etc.) it erases the Calendar alert as well, instead of pushing down on the list of notifications. Is this a design flaw or might it be due to the fact that I have 4 iOs devices using Calendar on iCloud, and someone else (wife or kids) might be viewing the alert on that device which causes it to think it's been "viewed" and erases it from the notification center on all devices?? On iOs 6 my Calendar alerts we're always present until I specifically closed them on my iPhone and this was really nice. The alerts aren't really of much use if I have to be by the phone the minute it goes off and if I'm not, there's no evidence on my phone that it ever went off. Please help.