What happens if J2 to H1B & J2 to L2 change of status applied same time?

Hi ,

Currently , I am on J2 -EAD visa & i am working for one of the employer and now my employer filed H1B application in April 2013 but at the same time my spouse employer going to apply for the change of status J2 to L2 during the month of June 13 as my husband is moving to his L1 . (A) Is the multiple petition can be filed at the same time?Does COS J2 to L2 affect my H1B approval process? (B) If my spouse employer apply J1 extension instead of COS L1. If J1 extension approved, which status I would be H1B or J2?