You have not presented any facts that would support a claim of singling out your petition. You still have your resident status, which suggests you...

The L2 visa holder can enter the US 6months after the L1 holder.

You may try H1B re-stamping at a reasonable time before expiration.

Clerical errors can be easily fixed at consular interview.

Using your taxes and the I-864, follow the instructions to the best of your ability. USCIS will RFE if there are any deficiencies. If you believe...

The quickest way is to request a USCIS and CBP FOIA.

Change of H1 employer does not invalidate H4 stamp is valid within the validity dates.

It is not recommended to travel abroad while a case in pending in immigration court.

You must answer in the affirmative and state you think it was an expedited removal. It is possible the visa officer has all the information.

If eventually you are divorced, you cannot, proceed with sponsoring spouse. You must withdraw I-130 with a final divorce decree.