I'm a little confused how the stopover in Panama works. I tried calling but I don't think we understood each other.

I would like to go from EWR to PTY to MBJ and back home. Am I able to do this with going straight from MBJ to EWR or will I need to stop back in PTY and from there go to EWR. The agent on the phone seemed to say no and told me there are only Thursday and Sunday flights from MBJ to EWR. She tried directing me to where I can find this on the website but I only saw it with a stopover. Has anyone done this recently that can advise me?

Thanks!