Eb2 Estimate Query

My Eb2 PD is Sep 2012. This PD was filled by my prev company and after that i have joined another company . The current company is yet to file my PERM and GC.
I need few clarificartions ’

  1. Any estimate on when final date of action for Sep 2012 we can expect
  2. Will it be good to join the prev company who filed my GC and use the PD without filing for new Perm and 140

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