You really don't want to be using the same account due to the way experiences are held for 5 minutes to complete your purchase. You will likely run into issues with competition for making your selections with multiple users on multiple devices sharing the same
MDE Account. You really want to consider using 2 linked accounts and booking different days vs trying to sync times for the same day.
Just make sure that you have your payment method(s) set correctly for each account. Also if you are booking for several days there will be multiple charges to your payment choice over a short time interval in the morning. It has triggered Fraud notifications for several guests.
I agree if you have delays or take too long to resolve conflicts using a single MDE account you will end up getting later return windows or you may miss out entirely.
Dave