If you are charged the fee as described above by specialks, LMT will reimburse you. If you are charged, I would contact them by phone to get the exact and current instructions for getting a reimbursement. I was not charged the fee, but my sister was.
Based on my experience last November, be aware that you
will receive a confirmation email from them as soon as you place your order, but that is
not the voucher you use to exchange for tickets at the park. That will arrive in your email much closer to the actual date of your trip (determined by what days you input into the system when you ordered your tickets). You might want to fudge by a week or so (on the early side) so there's the comfort factor that the email with your vouchers shows up in plenty of time.
All in all, though, we found LMT to be reputable and had no problems -- especially when we were aware of the little issues/tricks that sometimes come up. If I hadn't upgraded to an annual pass, I would be using them again for this year's trip. OH, another benefit of using LMT tickets is that when it came to exchange them for an AP, we got the full Disney on-line price applied to the APs, not the discounted LMT price. Just saying . . .

(And we pointed out the difference to the CM at the ticket booth, but they gave us the higher value anyway.)