Well I ordered one, paid on time with LTC and it says order expired now.
Lets see how this plays out..
Same thing .. paid with LTC withing 1h frame and now order shows still unpaid and expired. Blockchain link shows they received payment
I had the same issue this morning paying with BTC. I emailed support but naturally they were not open yet. I checked again about five hours later and my order shows that it is paid and all good. I suspect when the price of the coin you are paying in rises they let it go through, if it drops then they probably ask for more to cover the spread. I mean, I would if I were them.