Also, when I log into My Experience under the Disney site it lists the same hours... so I'd consider those official. I think (purely a guess) that the fact that Disney did not go ahead with the parties on the 1st, 4th, and 7th have thrown the planning sites off a bit. I know they ruined my plans.
There haven't been any updates by him, or any planning site that I can see, since the
MNSSHP dates were announced, for Sept. I'm hoping for some sort of update, somewhere, soon... I'd like to update my ADR's, as I expect recommended parks to change since the original calendar was posted.