Why is a cylinder lock key not symmetrical

To answer the question: It is almost certainly possible to get a replacement cylinder for your Andersen door which accepts the Kwikset keyway, and have it keyed to accept the same key you're now using on the front door... or reset the front door to respond to the key the new cylinder ships with. My storm door uses a Euro-style cylinder, which is uncommon in the US but a good locksmith ought to be able to handle this request.

As others have said, though, I'd replace the SmartKey cylinder while you're at it. They were a nice idea, but they really have proven to be less secure than I'm comfortable with. A replacement cylinder should be cheap, and rekeying it doesn't add that much cost.

With that last bit of info, there is no way to key the Norwalk alike with the Schlage using the existing tumbler, it must be replaced with a Schlage or even Baldwin tumbler, which has a Schlage keyway. Yes you can still do it yourself but you must remove the tumbler, take it to the locksmith and have it matched up. This will only save you a house call charge. The screws to remove the lock are hidden behind the latch plate most of the time. Sometimes there are visible holes through the latch plate to access the set screws for the lock. Just the Norwalk tumbler needs to be swapped out, not all three. But the locksmith will need to know the key that it will be change too as well otherwise he may give you a 7 pin Schlage tumbler.