Given a travel related situation, and given a specific question about the situation, summarize the question into a title
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Question: I recently applied for a short-term student visa, mentioning the departure and return dates as 13/05/18 and 10/08/18 (=90 days) respectively. After my visa got approved, the validity dates mentioned were 11/05/18 and 08/08/18 (=90 days) but since I have already booked my return flight on 10/08/18 and if I return back from France on 10//08/18 I'll be violating the visa policy.

What will be the best thing which I can do in this scenario?

If I go with this visa and violate the visa policy by exceeding the visa's validity by 2 days what consequences can I possibly face, considering the face that it wasn't actually my fault but a sheer mistake committed by people in embassy?

Answer: Can I stay in France more than the validity range of my Schengen visa given I'm not exceeding my duration limit?

Question: I will soon be attending a conference and staying at a hotel where my employer has negotiated a special rate. This is a large group booking and I will not be eligible for points or stay credit.

However, I happen to be a Gold member at the hotel chain in question (Marriott), which usually entitles me to handy perks like lounge access and free breakfast. Am I still entitled to these if the stay earns no points?

Answer: Elite perks at hotel when staying at a rate that doesn't earn points

Question: I'm a permanent United States citizen (by birth), but I don't have an SSN. I'm also a foreign citizen. My employer outside of the US wants to send me to work into the US for client on-site by asking for a work US visa that would be put into my foreign passport.

Is it legal to obtain and enter the US as a foreigner with such a visa, being at the same time a US resident? Can I enter the US as an American, but work as a foreigner?

I found this reference:

A foreign national or alien entering the U.S. is generally required to
present a passport and valid visa issued by a U.S. Consular Official,
unless they are a citizen of a country eligible for the Visa Waiver
Program, or are a lawful permanent resident of the U.S. or a citizen
of Canada.

Answer:
Is it legal to enter the US with a US visa while being a US citizen?