What is the exact your question? You wanna to know about meaning of "왜 이러는 걸까요?" "왜 이러는 걸까요" is translated into korean as "Why it does?" For example, Let`s assume that you use the computer, however it turns off suddenly. In this circumstance, you have question "Why my computer goes down?". In this case, Korean thinks about that through "왜 내 컴퓨터가 이러는 걸까요".

Yes, it's along the lines of "Why is it like this?" (not "that") :) 왜 - why 이렇다 - to be like this/in this way ~는 (present tense noun-modifying form) 것 - thing (으)ㄹ까요? (in this case, "I wonder...". It looks for an opinion as you wonder aloud) -> 이러는 것 - a thing like this (NOT "this thing" [이것]). So ... "I wonder why it's this way???" As for the other things you've posted, they're kind of informal and modern/young (like casual text/Internet talk). At least, it's not so literary. But anyways, I will therefore leave it to someone else :) 정답 - correct answer

Yes, it's along the lines of "Why is it like this?" (not "that") :)