首先谢谢8老师这几天耐心的回答我的许多问题。再把我的情况简述一下：
EB2 with PD 3/27/2007. My original I140 has been approved in 2008 and the I140 amendment was approved this August after company merger. I submitted my I485 with RD 8/19/2011. My EAD/AP has been approved 10/11/2011. Now the company is closing the office. My current H1B will expire 1/8/2012 and the company filed my H-1B extension to VSC in august still waiting for approval.
现在已经得到公司的relocation offer，要去邻近一个州的办公室做同样的工作，除了地点，别的没有变化，但下一个月就应该去报道。在过去的两周积极找工作，也得到同一城市另一公司的offer，做相似的工作。
我想请问：
1.对我这种180天不到的情况，即使同公司不同地点可不可以用AC21？
-Yes.
2.公司用的是fragomen，以我在过去几年和公司以及律师打交道的经验，律师一定会do everything by the book,而且HR的人有任何问题都会去征求和听从律师的建议。现在律师认为in his opinion, I should be able to use AC21 portability for the relocation even before 180 days.而且我也知道公司发给了律师LCA amendment and portability initiation request。我想知道律师如果理解错误（有时候真希望有些律师在为客户服务和挣钱方面仔细选择），
他给移民局通知我要relocation，然后申请用AC21 portability，是不是我的I485就没救了?
-Your I-485 should be fine.
3.我已经找到一个愿意为我办H1的相似工作，而且在相同城市，这样就不会和家人分开，我想请问若即使留在公司内部也会因律师的错误理解有风险，不知道和直接去新公司承担不到180天的风险，那个更保险一些？
-The only different risk is that if you change employer before your I-485 pending is > = 180 days and your current employer withdraw the approved I-140, then your I-485 is void. But if you still work for the I-140 sponsor only in a different location, this will not happen.
非常感谢！
