This is clearly a synchronisation issue between the model (i.e., the generator info) and the view (i.e., the text field). There are several solutions:
Follow the model and overwrite the text field when entering the output options step. This will be annoying when the user always wants the modified embedder command.
Follow the view and overwrite the model if the user entered a different command earlier. This can mean that there is no immediate way to return to the original embedder command in case the user messes this up completely.
The best solution would be a combination of the two. Use the value in the text field, but signal if this is different from the suggested embedder command (e.g., by colouring the text field) and provide a button to reset the commands.
Follow these steps to reproduce this problem: