Yes you should correspond with the asylum office to withdraw the application.

Yes you would need to request a FOIA to do so.

Yes the form will ultimately be denied but it does not prevent you from filing a separate application.

It appears the answer would be no based on information provided.

Contact USCIS directly to inquire about processing times.

Yes she should enter within 6 months of issuance.

I agree with my colleague about possible recourse.

It would impact or delay the H4 AOS only.

No you don’t need to apply again for purposes of the GC interview.

No this shouldn’t affect a pending marriage based AOS although not advisable.