Have you measured your cycling inseam? That saddle looks pretty low for someone 6' tall on a 56". I'm 6'3" on a 58 and I have a lot of seat post. Probably could ride a 60-61. Your saddle/bars do not have to conform to any rules but there is a general trend for road bars to be lower than the saddle. If this is properly fit then it's properly fit. However, without some more data (like cycling inseam) it's hard to say. It's possible the shop set you up based on preconceived notions about newer riders rather than something more comprehensive and based on your actual body style and flexibility. A pic of you on the bike would probably help.