Any mention of what the fee will be per entry? That could be a deciding factor for some deciding how many they want to enter.
Also, since they are allowing you to enter alternate judging locations, does that mean you may send some entries to one location and some to another?
I read that as you select where you would like your entries to go first. If that site fills before your entries are assigned, you will have your other preferences on file. The reasons would be you are comfortable with the judging centers past performance, quality of judging, and shipping costs. I don't read that as the ability to split entries.