Whats the big deal in just refreezing when I want to? If anything I would think that with setting a date I might forget about it, apply for a EX card and get rejected.
No big deal, at least in NY. I believe some states charge a fee. I used to freeze, un freeze, freeze, unfreeze, etc, but it got tiresome so I just unfreeze it for a month or two at a time--I tend to stagger my AORs--and I really only freeze for Citi which limits how many apps you can do anyways..
If you're having trouble freezing online you can also do it over the phone with their surprisingly intuitive automated system.