Originally posted by jenluckenbach
It is possible to have chosen the wrong cat for your situation. A kitten in general may not have been the right age for you. But her behavior is NOT due to being a shelter cat. Everything you describe is perfectly NORMAL. If you need to take her back, then please do so. No one will be angry. But I would suggest re-thinking getting a new cat. If you need to have a calm kitty, get an adult who has already shown that he/she is calm. Kittens have energy and she is using it the only ways that she can.
Jen has given you excellent advice. I can't add a thing really. When we adopted Andy he was a rambuctious little guy which really was quite a change from Trevor who was more of a laid back kitty even as a kitten. At times I wondered what I had gotten myself into. After a couple of months he began to settle himself down and now is the gentlest, most affectionate kitty anyone could ever want. That may happen with Cinnamon in time but, as Jen says, maybe you should have been thinking along the lines of an older cat. Kittens will be kittens! Whatever you decide I wish you and Cinnamon good luck.