My question is if I can use the same ds 160 application form that I filled out if I haven't make an appoinment yet

You should be fine just let the consulate know your change of dates at the interview

Am I responsible for what she will do it in the future, or in case she will not leave the country when she supposed it?

I doubt you will be held responsible for her

I came to the US on a B2 visa to train a sport? I have applied for an extension to stay and train- is this a valid reason ?

Yes you should be able to extend oyur B2 but show you have proof to return

I would like to know how i can have a legal status in canada

Consult a canadian Immigration lawyer. This is a US forum

IMMIGRATION PETITION=I-130

No you do not need ot fill in his information again but oyu do need to list his children if he has any

Is I-140 approval prior to I-485 in case of EB1-C for someone who is already under L1. What processing time should i expect?

No it will not impact your application. You only have ot work for the employer when your green card comes through

Should we remarry and refile or should my ex husband wait for I 360?

Consult with an attorney. How far along is he in the I360 process

What is the probability my gay domestic partner--a Brit--can immigrate to the US with me, an American citizen?

Unfortunately USCIS does not recognize gay marriage at this time. it would be easier ofr him to find an employer to sponsor him

60 days remaining to file I-751, but my marriage is in trouble. Should I get divorced first and then file it, even late?

Talk to an attorney to discuss your options.

generally it means he was in the USA without lawful visa status. Was he convicted of a crime?

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