US Consulates

My wife needs to transit through a US airport for not more than 5 hours in February 2010 in order to go back to her birth country. However, she filled out by mistake a DS-160 Non-immigrant visa to submit to the US consulate in Vancouver (Canada) because at the US consulate in Vancouver they require DS-160 Forms to be submitted to them. However, she decided to fill out a second form called DS-156 in order to apply to another US consulate in Canada (in Calgary) for the same US transit visa to get an earlier appointment there. What does she has to do now to correct this situation ?

Hi...i have a question...i came to US on my L2 visa and am here for 1 month.meanwhile my company has initiated for my L1b visa in India..now my question is...
1. Should i have to travel back to my native for Visa stamping or i can apply for COS from L2 to L1B in US itself?
2.Since i already own L2 visa is there any chance that my L1B is rejected?i have been working in the company for 1yr and 2 months only now.
3.in case if my L1b is rejected is there will be any impact on my already approved L2 visa?can i come back to US again using L2 visa?

I really appreciate ur efforts here.I had one question to ask u if u can answer humbly.I am a doctor from india and i had got a residency in internal medicine last year.I got my H1b visa stamped but coulnt go to usa coz of some reasons.So the hospital got my H1B visa legally cancelled.This year again i have got residency in another hospital and they r ready to sponsor my H1b visa.I wanted to ask u that will there be any problem from USCIS in processing my petition this time as my visa got cancelled last year.As i have not told this hospital about my visa cancellation last year will that be a problem.Will my petiton be processed in a routine way this time too by uscis.