Does this have an alarm if you enter the code incorrectly?
The code will beep with every digit entry, and if you enter the code wrong, it will beep 4 time as an audible warning that you entered the code wrong. You can call it an "alarm", but we would not call it a "tamper" alarm, just a wrong entry code "alarm".
Can it be stored on side or does it have to he vertical?
Vertical. Door won't open properly if its sideways.
Have you fixed the severe security flaw yet? That you can register a fingerprint without opening the box.
This flaw was fixed. We added a lip that would prevent the piece of metal from pressing the button when the safe is closed.