Issue #232; #235

@crankycoder r? 

Yes, it's sort of a daily thing. I'll try to stop, but, I may need professional help at this point.

What? I meant the code. 

The other thing is way beyond help.
DeviceIds are unique (in so far as UUID4's are unique) : https://github.com/mozilla-services/FindMyDevice/blob/dev/sql/create_db.sql#L2.
Duplicate DeviceIDs would cause a good many problems and should be removed in any case.