Confused about transferring to a different realm

Hey guys,

So i just transferred from horde to alliance and now i want to change from Barthilas to Frostmourne. I am having some issues doing the Character Transfer service…

So I select my character and select a destination realm and hit Continue…however it errors out and it seems that it wants me to decide if i want to change “Change faction” or “transfer account”?

I dont want to do either of those two so I didnt check their box for them…but i cant proceed… Am i missing something here?