I right there with you! I have Polar Expedition tour booked as well and am furious about this. I don't want to be the bearer of additional bad news, but when I called re: booking Tour 1, the operator told me that doesn't guarantee that you are the first tour of the day. They really don't know how many tours they will have that day--depends on the number of people booking tours. When you check-in before 10 am at the guest services desk, then you will get your tour time. They will know what time the tours are that day and the sooner you are there, the better chance you have of getting the tour time you need. DD better appreciate my frustration with this park!
If anyone has experience with booking tours, checking in for tour times, etc. it would be greatly appreciated!