Amazon cancelling preorders for physical release of Runbow on Wii U (UPDATE)

UPDATE - The game is not cancelled, so no worries. This update comes straight from 13AM Games...

Runbow Deluxe is absolutely not cancelled. Runbow Deluxe is actually in the process of getting certified, so this must be a mixup. We're getting to the bottom of the pre-order thing for those that have already ordered. I repeat: not cancelled. We encourage our friends and fans to stay tuned to us for updates. If anyone else encounters pre-order issues, please tweet at us and let us know. We hope to have this sorted out shortly.

ORIGINAL POST: Here's something a bit worrying. Amazon has cancelled multiple preorders for the physical Wii U version of Runbow. Those that preordered the game are now getting an email saying that the title is no longer available. It seems that other retailers are still taking preorders for the Wii U version, so let's hope this is just an isolated Amazon issue and not an issue overall with the physical Wii U release.