Are you trying to say that the game or the characters in it lied?Odine said the machine must have a limit Ultimecia maybe need to go further into the past to achieve Time Compression. What a poor excuse.
JME must have a limit, GIVE ME A BREAK! It is because JME doesnt work out in the future that`s why Ultimecia need to find the REAL Ellone to achieve Time Compression.