OK. Just to follow up my own post. The news is mixed, but a little positive. I called customer service and they weren't too helpful but they suggested that if I cancelled that the miles I had put in initially would be returned to me but the miles I "purchase" as part of the cash portion of the purchase would not get deposited into my account - I would just get a cash refund. I went online and cancelled and this is exactly what happened. The $60 was returned to my credit card and the miles were returned to my account.

The silver lining, the miles didn't expire. The new expiration date is the end of the current quarter rather than the end of the last quarter. So looks like there is a way to grant a slight extension to your expiring miles. Who knows if this would work repeatedly. I'm guessing not at some point. Now I've got to try and use up the initial miles.