First, did you notice that across the top, it gives you more than one option for the times for all three? There are typically either 3 or 4 option tabs. You can click on each one to see if any of them work for you. Take one the options it is giving you. (If you want morning FP+, it can actually be easiest to take the night option if you want them in a specific order, so that you won't have to move any out of the way to get others where you want them). Once you have taken and option and the FP+ are set go to the one you want the earliest and hit modify- on the left by the time, there will be a box to change the time. Pick that, then scroll through the time options and pick the time that is best for you. Then pick the one you want next in time and do the same thing- then on to the 3rd. I have done this before for our own trips and I just did it this morning for a friend of mine.