H-1B身份六年到期问题(已有EAD)

当前情况: 485已经于January/2012提交. 三月已有EAD. 排期是September/2007. 九月底H-1B身份六年到期(于2009已renew一次). 十月排期退回July/2007.

问题:  My H-1B还可以再一次延期3年? 还是一年? Today is already in the middle of September. If I apply for another H1B renewal, I believe it will not get approved by the end of the month. So is my status still in valid H1B status when I am waiting for the H1B renewal approval after the end of the month? Or am I automatically switched into AOS status with my EAD card?  If I am switchd into AOS status and my H-1B is renewed successfully for another 1 or 3 years but my 485 is denied later on, is my renewed H1B still valid? Or am I automatically switched back to H1B status?  If not,  then no necessary to apply for another H1B renewal, correct? 

我艰辛曲折的绿卡路!

 Thank you all ver much!

鞠躬!