Crap! I just sent them my rolls I shot this summer ... I've had issues about this with them a few years ago. I vowed never to use them again back then, but they redeemed themselves processing my 110 film recently. I hope they don't fcuk up again. They're also not the most pleasant people to deal with over the phone from what I recall.
You also don't have a choice, short of throwing your exposed rolls of Kodachrome into the dumpster.