Interesting... sounds like they put some thought into how they programmed their app... check for updates, download updates, install and give the user new updated app without them having to do anything... I like it.
Maybe others don't think so, but it's better than having people left behind and have a broken app after they make some major change to their app, or something else.
I noticed it wanted to be updated, so I did....3 hours later it was back in my notification bar wanting to be updated again...I was unhappy about it but i let it update the second time. I woke up this morning and it was once again telling me it needed to be updated, now it may be time to flame amazon.