Are there htc one e8 (M8SX dual sim) variant?

I'm really confused with all those variants. According to this pic, there are only single sim variants for m8sx but there seems to be dual sim m8sx variants when i searched google. Please kindly reply. Thanks.

Unroot guidelines needed for E8 m8sx with s-on

I messed up on the rooting, wiped OS & had to downgrade to kitkat. The phone's still S-On. Now I want to unroot the phone to receive OTA update. I am supposed to flash the stock rom and stock recovery, but I couldn't find any from http://forum.xda-developers.com/one-...-twrp-t2903210 this thread. And I have never tinkered with htc devices so I am basically a noob at this point.

So, a step by step suggestion from a good Samaritan will really be helpful. TIA. :)