Even BBTS have listings that are updated at the end of a month to say arriving next month. they never email all their buyers updating this sort of thing, you have to go to the listing on the website to find out and sometimes its not till a few days into the new month until the listing updates.
I have experienced this myself. It's frustrating but what are they going to do when that's all the information they have. I've seen this with listings of Hasbro product, let alone third party or otherwise.