The ids are difference between Appstore builds and Development builds

I used BPXLUUIDHandler to generate the id for guest user. When the app is downloaded from App Store, the uuid is "071BF442-1B3D-4984-9646-87...". And then I build the app from Xcode, the uuid is "BD772772-B3EC-4E17-82BB-58...". This cause 2 guest user on one device in our system. I'm not sure why this happen, is it a bug? Any way to fix this? I tried on iOS 8 official version.
Thanks.
