Well apparently they are messing with the secret stashes, and something has gone horribly wrong! When trying to request help to open it the system is sending mystery bags instead of secret stash requests. The gift system defaults to a blue mystery bag when an expired or disable item is sent or clicked to be opened.
The gift id is correct, so something needs to be fixed at zynga! If you are experiencing a similar issue please contact them on live chat so they can narrow down the problem and correct the issue. They were unaware of the issue until I contacted support myself, so help out and report any issues if you have time. Don't just ignore it and hope it fixes itself, that takes a lot longer than the few minutes in chat support. Or you can send them an email if you don't need an immediate response, or just want to report a glitch.