EAD (WorkPermit)

Hello All,

I applied for AOS (I-485) and EAD on C9 category for marriage to a US citizen.
I just wanted to share my timeline and ask for advice:

06/10: Sent my pack to MSC
06/16: Case was received
07/03: Request for initial evidence was sent
07/14: Biometrics done
07/17: Response for initial evidence received
08/21: I called for an expedite request due to a job offer
08/24: Expedite request assigned to officer
08/25: Supporting documents for expedite request was faxed and I added an eviction notice due to not paying my rent
08/27: I hit 75 days on EAD so I sent SR (I know RFI resets the clock but it wouldn't hurt to try)
08/28: Expedite request completed

No other updates so far from USCIS
I e-mailed my congressman and he replied asking for supporting documents and I sent them today.
Also, about a week ago, I called USCIS to ask if "Expedite request complete" means it was accepted or rejected and they said I should call back after 30 days for the last update.

My questions are:
1- What does expedite request mean? Is it accepted or rejected? Should I send another request?
2- The company that offered me a job wants me to start ASAP even if I don't have my papers. If I do that, will it be illegal and affect my green card application?
3- I didn't apply for I-131 Advanced Parole as I have no plans of travelling now but when I get my conditional green card, do I have to send I-131 or can I use the green card to travel abroad?

I'd really appreciate if someone answers my questions.
Good luck to all of you waiting :)