This is purely speculation, but I think this an attempt to mess with notification services. I had signed up for a notification service for WOC dessert (before the date was even open). The morning it opened, I was able to reserve at about 3am Pacific, I ended up getting the notification exactly at 7am, meaning what ever server the notification was on, couldn't see it until then.
Of course the whole mess is probably just Disney IT being Disney IT, but the sceptic in me wants to make it into something more sinister
. The whole stupid thing is just frustrating and irritating.