I was told that I cannot have two EAD at same time. Even I have requested to cancel my OPT EAD but somehow it was processed. I was surprised by th date mentioned on OPT EAD card which starts from the next day of TPS EAD expiration. So, currently I have TPS EAD, if TPS didn't get renewed then I will still be able to maintain F1. By that time I will get some update about my PERM status. But my OPT EAD is only valid for 6 month. Let's wait till october month for announcement of TPS extension. I am sure it will get extended.