Is that going to be a problem during the whole process?

You should be able to obtain a change of status to H-4 with the USCIS.

Can I reapply saying that extension not done? why they reduce my H1B validity rather increasing. What to do

USCIS should accord an end date coterminous with the period covered in the LCA and I-129H, per the employer.

I-485 permanent adjustment

You would need to provide proof of unavailability before you could try to rely on secondary evidence.

Was it sent to me by mistake? What's the best way to solve the issue if it was? Thank you

The question could be whether you submitted proof of lawful admission with your filing, which is required even for a spouse of a US Citizen.

H1B transfer - Bridging question

These questions involve very complex application of laws, such that it would be best for you to consult with your company's immigration attorney...

As long as the position and employer remains the same, you would not need to file a new petition or seek a new visa prior to the renewal date.

Do you get any money or benefits from your half a million investment for a green card?

There are hundreds of different regional centers throughout the US with different business models. Some have been more successful than others at...

Can I change my status from B1 to L1 in the United States?

Yes, it is possible to seek a COS from B-1 to L-1 while in valid B-1 status. Consult with an attorney.

Is it possible to apply for adjustment of status or GCEAD?

That priority date is not current as of the March 2016 visa bulletin. You can check this any time at www.state.gov

What kind of evidence does the daughter need to provide relationship ?

You must file an I-751 for the daughter to remove the condition on her residence.