The exact same thing happened to me recently. I ordered an album, got a shipping notice, after a week, sent an email and they just said it is on its way and not to worry. Another week and a half went by and it just showed up as delivered. Tracking never updated beyond label created, and it took too long, but it did arrive.
I wrote them again today and they apologized for the vague response on Friday. They said that USPS would most likely be picking up the shipment sometime this week and if it takes more than a month (!) to receive the package that I should write them back.