1) It hard to tell for sure, as it looks like the warehouse processed your order for shipping this morning. I think the Ponyfinder backorder status affects other orders placed after yours, but not your order. The system just can differentiate well for display sometimes.
2) I'm not sure what happened with the shipping method, and appreciate you bringing this to our attention. It looks like the shipping MAY have reset when the Ponyfinder was added, and reverted to the cheapest shipping method...not entirely sure why/how. I'm passing that along to the tech team to look into. Our apologies! If you have any problems receiving the shipment, please let us know.