Clarity on Cap-exempt rule when I-140 approved?

You may extend H1B beyond six years with approved I-140. Will you have H1B? Talk with your Immigration attorney.

You are permitted to join the petitioning company once the petition has been filed.

Can I know if my spouse change his mind and want to divorce me either before or after I get the green card to throw me out?

Up until you obtain resident status, your spouse may withdraw the petition. Once you have resident status if it is conditional you will need to...

How can I find out my mothers current status with immigration?

Your mother should file appropriate FOIS’s and obtain her record and share the information with you , if she does not already have the records....

Can I work on opt?

You will need a valid EAD from USCIS on OPT coming from an accredited school.

Can I get my H-1B transferred to a new employer after taking 1 year career break?

If you have not used the full six years yes or your new employer can file for a new H1B

Can I file in small claims when a travel companion cancels trip causing me to lose $1,100 because no legitimate reason provided?

This is not an immigration question. I will repost to another thread.

TWO VISA'S OF THE SAME CATEGORY ?

The old visa is expired and not valid. Writing cancelled across the visa is not needed. Safe travel.

Does the processing time of COS from H1-F1 count in my future H1 time?

It depends on what date for the COS is issued by USCIS,

I already did my fingerprint when will be face my interview for citizenship ?

You may check the local Immigration processing times on the USCIS website. Anticipate 6- 12 months sometimes more from filing date.