I just plugged a 3s lipo into a 4s charging port on my FMA Cellpro 4s Charger. I am using a adapter board because there are so many different plugs. It gave me a code 28. (cant detect pack) and after looking it up online I discovered my mistake. so I guess the lesson of the story is pay attention to detail.
Things could have ended badly for the battery. I guess I got lucky. Sharing this so others might not make the same mistake I did.