Can my president meet with me and can they fire me because I voiced concerns about my position?

1. Why are you communicating with work about substantive issues while on FMLA leave? 2. Do you believe any of this was motivated by you taking...

What do I do? Very angry.

That sounds very difficult, but I do not see it as a valuable claim for you. I am sorry you had to experience that though.

Could I take legal action against a client? for defaming and time loss if I have proof? (I'm a design freelancer)

Why not simply sue for the sum you are owed?

What is dismissed and sealed in the situation

It sounds like you only received a violation and it was dismissed, so no you would not have a criminal record.

What should my wife do after she claimed benefit for unemployment outside of the US without knowing it was not allowed?

I would recommend she contact unemployment about it and be honest.

Can my current manager hold up my new start date at new position with new manager/unit?

Whatever the internal rules of the parent company are will determine if they think this is okay or not.

I don't see a valuable claim against the employer coming from this.

How do I make my employer pay me?

I would suggest simply filing in small claims court.

Can you claim hostile work environment & pay disparity when filing a complaint with the EEOC?

If either issue is linked to some form of discrimination or retaliation, then yes. Have you considered speaking to an employment attorney?

How much can be court ordered for a dad that is not employed?

You may have better luck receiving answers if you post this under the family law heading.