I'm trying to redownload my purchased iTunes movies to an open box iPad Pro I purchased and I get the following message: "This Device is Already Associated with an Apple ID. You can download past purchases this device with just one Apple ID every 90 days. This device can be used within another Apple ID in 57 days." The other issue I'm having is when I try to verify the serial number on Apple's website, I get the following message: "We're sorry, but we are unable to complete your request at this time, please try again later". I've tried it multiple times within the last few hours and just now I even tried serial numbers off my other devices which immediately pulled up warranty info on my iPhone and Air 2, this IPad Pro keeps getting that message. Is this thing a dud?