We are going 8th October, partly in an attempt to mitigate the Columbus Day crowds (we are from the U.K. and didn’t realise we were arriving on a holiday weekend until we booked). We booked for 7:30am, and based on previous posts in this thread, that event sold out.
There is now a 7am slot available, which again based on this thread, seems to have appeared in the last couple of days. I don’t honestly know if the entry time matters, but I’m going to call Disney tomorrow and ask to move it anyway. I’m also incredibly annoyed that they seem to have increased the capacity, since they went from sold out to having more availability. It’s a pricy event (3 adults, 1 kid) if it is not going to get us much benefit. We are there for 2 weeks so I’m considering just cancelling altogether and going early on a quieter day when it’s not a holiday weekend.
Edit: Rather than waiting to call Disney tomorrow, I moved the time online - I can to cancel the existing reservation and replace it with a new one for 7am, and of course pay for the new reservation and wait for a refund. So at least it is done, though in the bigger picture I think I may end up cancelling altogether - I’m not sure it will now be a big benefit to us on a busy day if they are increasing how many people can attend the event. We are going to EMM at MK the next day, and I hope it is more successful.