The policy is inconsistent:

If your new flight schedule was changed by more than one hour, you have some options:

• Change your flight online to one that better suits your schedule - up to 1 day earlier or later.
• Cancel your trip online and receive a refund* to your original form of payment.

But ...

*Please note: To qualify for a refund to your original form of payment, you must have an active reservation on the impacted flight. If you voluntarily canceled your trip and received a future travel credit before the flight cancelation, you are not eligible for a refund.

So, what happens if your flight was changed by more than one hour and you cancel? The flight was never canceled, so you voluntarily canceled it per the first part of the policy, and then don't get your money back per the asterisk?