I think i can't explain it too much since it's not that much to explain.
I was wondering if it is possible to "move back" a page you just moved.
You know, when you use the 'Move' action which technically takes the page to a different title and when you use the past title it will redirect you to the new one.
But is it possible to undo this kind of edit or not?
Not in one click like a normal edit, no. The easiest solution is to move the page back to where you originally wanted it, and then add the "Delete" template to any redirect pages which were created in the process that you don't need any more.
PS: Another thing to note is that the "User:" namespace is typically reserved for actual wiki user pages (e.g. User:Space in my case), as having a page titled "User:Johnathan Nox Carter" would imply that there is an user account on the wiki with that user name, which there isn't. I could rename your user to "Johnathan Nox Carter" if you'd prefer to use that name on the wiki as well; just contact me or any other wiki sysop and we'll see what we can do.
As for this page (again, a mistake): http://www.discoverygc.com/wiki/User:Joh...Nox_Carter
I believe it should also be somehow deleted or... "undo-ed", because my actual user page "User:W3.player" redirects to that one.
Basically i wanted all links that are like "[[Johnathan Nox Carter]]" to link to my "User:W3.player" page. (no use to change the wiki account name, in my opinion.) So... In theory i have to delete the two/three pages or something. I'll use the template on those needed and just copy paste the code i actually wanted on the "User:W3.player" page, as for the redirect from [[Johnathan Nox Carter]], perhaps it is possible to link it somehow.
EDIT: Never-mind, managed to fix everything. Thank you very much!