Moved from L1A to H1B..GC filed under EB2, can it be converted to EB1?

Yes, you may request it in more than one category.

Good day to all.After filling Adjustment of Status from K1 how many days to wait until the embassy call me for final interview?

Your question is quite confusing as your are combining different procedures together in your question that do not relate together. Please reask...

This question should be directed to your employer's immigration attorney as they have much more knowledge of case. That being said, just report...

Is derivative US citizenship a possibility for myself, or my mother?

Your question requires a sitdown with an experienced immigration lawyer to sort through as these cases are hard to substantiate. Also, much will...

Will i be eligible under CSPA as derivative child on F4 category?

You lost your ability to come within CSPA once your married, unfortunately.

Not sure what, how, when or where to start, advice would be appreciated.

Somehow your question came through the immigration area for response, but this is a worker's comp. question - not immigration related.

Immigration - H-1B to H-4 to H-1B time recapture

Yes, you may do so and there is no impediment to doing so.

I dont want my husband to file for his parents?

Sorry, but this is your husband's perogative - not yours.

If I file for U visa and get into priority list and just get the deferred action protected status and EAD can I travel outside ?

I would advise you to sit tight until the U visa is issued as advance parole is generally not granted for such short visits without an emergency. ...

I am on H1-B(Nonprofit) and verge of being fired/terminated from the current job. Please help me.

Your status will terminate the day that your job ends. Since your spouse is a derivative of your status, her status will end on the same day. ...