So has anyone gotten Touch ID for purchases to actually work consistently. I've gotten the touch prompt once so far. Every other time it doesn't even give me to option...it just asks for my password. I get I have to enter passwords again after a reboot (well I know I have...don't really understand why...not like my finger is going to change after a power cycle.)...but it seems like Touch ID itself on purchases times out if you don't make another purchase quickly...is this a bug...or is it just too secure for its own good?