How do you legally correct the spelling of your last name if you are a citizen and immigration services made a glaring mistake?

No court/judge will provide any waiver of the fees under the circumstances.

Will my mother's I-130 petition gets approved before my siblings?

Yes, you better believe it - siblings' could take up to two decades.

Unless you demand payment of back pay you could be seen as complicit in this rather than just the "victim" in this,

Second B2 Visa extension due to Covid-19 related travel risk?

No such exemption or rule. Mom can apply for second extension.

I agree. Sister will need to check out other visa options that are more readily available.

how long remaining for approval?

Processing times for any type of case are published at the USCIS website.

Wrong receipt number for I129 in FOIA request?

Rest assured that this error will not cause any problems for you in the future.

B1/B2 extension beyond Visa sticker expiry date?

Normally visitors are admitted for 6 months and they are eligible to apply for extension.

As long as have a valid EAD issued by CIS, can.

Is EB1C I 140 premium processing effective from today(HR 8337) ?

The new PPS fee went into effect as of yesterday,