Yes, and they often re-release them for the outlets.
Up until the last 2 or 3 years, the serial numbers were stamped my a mechanism that was manually changeable, like an old-style printing press or one of those changeable date stamps you still sometimes find in offices. I haven't seen any pics or drawings of the new creed stamping system but it's a lot more precise, and there are a lot less variation between creeds from different plants then there used to be. Some of the older creed and serial number stampings were so unique to each plant that even if I didn't know the plant code I would still be able to tell where the bag came from just by the fonts they used.
Understand too that every time Coach put a new plant on line, there was always a "debugging" period where things like creed and serial stampings and the precision of the stitching around the creed patch would be a bit shaky for a few months until the new employees got the hang of how Coach wanted it. When they moved production to China, new plants were coming on line constantly. You can almost tell how long a plant had been in full production just by the way the creeds were sewn.
There's a lot of background history involved in something as seemingly simple as a creed patch, and you always have to take into account what was going on with Coach during that time period. And for authenticity purposes, it's usually the most important part of any Coach, at least on bags older than about 2 years. That's why I don't get too involved in authenticating newer styles, the creeds are just becoming too "cookie cutter" and aren't as useful (or interesting) as they were before.
