It's odd that a shop would miss fit you by that much...but 4 cm of spacers is not that unusal. And the seatpost is a little tall, but how does the bike ride and feel? You said you found a comfortable position. I know a couple of friends that has about the same amount of rise on their bikes. It sounds like you have some other bikes that you could measure and compare, but in the end, it about how well the bike feels when you're riding it.