Does new L1-B invalidate existing L2 to reenter US

[buzzhash]

Hi,

My current L1-B is valid till Oct 2012. I am travelling to Canada for a new L1-B stamping and my wife is also travelling with me but is not appearing for Consulate Interview. Her L2 is also valid till Oct 2012.

My question is:

1) If my new L1-B is stamped in Canada, will she be able to re-enter US in her existing L2 ?
2) Is it also true that if my new visa gets rejected, will my current L1-B be also cancelled and will I not be able to reenter US ?

Please do let me know. We are travelling next week and are very apprehensive

Thanks,
Harish