Macovei breaks from the scrum and reaches to score.

Go again!

Definitely double movement

Obviously not.

Well he was tackled, stopped moving, then rather than place he moved his body again to get to the line.

Double movement means you attempted to place the ball over the line twice after you stop moving. He was tackled, then had one attempt at placing the ball over.

If it was a double movement why was it given by the TMO and referee agreeing with him