Why have I had to register my TurboTax product 3 separate times, ALL ON THE SAME COMPUTER? Seems like after every update, I have to put in my registration code AGAIN!

I bought TurboTax Deluxe on Amazon a little over two weeks ago, downloaded it, and registered it immediately.  Since then, TWICE I have had to get the registration code and re-enter it after updates.  Can we please cut this crap out?  I've been a TurboTax user for 15  years, and I've never had to go through this BS before.