Same file in multiple views is actually possible but difficult to find: Under file you have to say 'duplicate in other view' (or something like that, I use Vim now).
I know how to achieve it, (File > New view into file), it's just not as natural as jedit (You just open different views and the current open file defaults to opening in the new view too).
If there's a way to set this up in ST2, please feel free to comment!
Oh sorry. I thought you didn't know how to achieve it, because I knew that I struggled a bit since I think the implementation is really cumbersome and I didn't expect it to be that way. My fault, sorry.
If there's a way to set this up in ST2, please feel free to comment!