So are you thinking it does not fit because its longer (it holds more ink than an OEM cart and therefore is.)
After priming the cartridge (so it does not introduce air into your printer), did you insert it into the printer?
You should get a message that a non-OEM cartridge has been installed. You should accept these messages by scrolling down and clicking the accept button. Then go ahead and print with them.
Our shipping records indicate that you were sent the correct carts - the id that you are reporting on the cart says it is correct. Here is a video of what they should look like.