This is a duplicate posting and few attorneys have addressed this question elsewhere on this platform. If still really confused, it's best to...

Your thoughts are good but not required. In general, the listing on USCIS forms provides an excellent example of supporting documents to file with...

If marriage is relevant to your immigration status, annulment is not recognized nor accepted by USCIS. Any termination of valid marriage must be...

Applying too early is your error and not USCIS error. Your form I751 is properly rejected. Await USCIS directives.

A timely and correctly filed form I539 prevents overstay and unlawful presence on departing US.

You may withdraw your COS application by notifying USCIS in writing.

If form I539 is timely and properly filed, no overstay results.

It's best to consult a lawyer to review your specific case, for clearer understanding of eligibility.

Consult with immigration lawyer experienced with O-1 visas and they would determine if you're eligible.

Your daughter needs to file form N400 but wait until you hear from USCIS. You did not mention what happened to your N400.