Sometimes travel bug(coin) pages are slow in updating. It shows in your inventory, but also still shows as being in the cache. It will probably update in the next 24 hours.
I agree with DresselDragons to aim for getting the coins to their new owners close to the proper Holiday and making sure they are marked or decorated for that Holiday.
If you have your activation code, just go through 'activate a coin' again and it will say it's already activated, but you can edit the origin and release date, I think, as well as the name and such.
Thanks! Maybe a thread subtitle could be added by a mod. so people will notice they are in preorder if they aren't tracking this topic. I guess it being bumped to the top every few minutes will do it, too.