Ya, that's kinda weird. Perhaps you can give them a call and ask instead.
Most people don't recommend purchasing a package here because of the change fees incurred if you make changes. Room prices can drop quite a bit and if you are locked into a package, you can't get those changes.
You can easily book room only at
www.loewshotels.com and get discount tickets at
www.undercovertourist.com
Also, quite often annual pass rates will come out that save you a ton of money even if you have to buy an AP. APs at Universal are not that much more expensive than a multi-day ticket.