How do you disable all-day event notifications?

I've already read the various threads about the issues with all-day events disappearing from the Today view and only appearing in the Notifications. However, I am having an issue when trying to disable all-day event notifications. I currently use my all day events from my work calendar (Lotus Notes 8.5) that is synched to my phone. I have disabled the "Notify Me" option within Lotus Notes and changed the default all day event notification on my phone to "None". The problem is that this has not disabled any all day event notification and I still get notified every night at midnight for the event. This didn't happen on iOS 6 or any of the iOS 7 beta versions. Is this something that can be fixed? Thanks!