Trackers in Multiplayer

[Ian25]

Just quickly posting this question before I hit the hay so excuse me if it's worded weird.

In multiplayer whenever I left-click on someone with the tracker it tracks them. That works fine and it will track them around the area just like it should. However, as soon as they teleport away (and I assume run far away?) the track is broken and it no-longer shows the compass. Is this intended? Or a bug that will be fixed?

On the other hand, with what little I know about programming, isn't it nearly impossible to track an entity once it's out of the render distance?

And finally... Would installing optifine and turning it to extreme, load more chunks, etc. allow me to track people farther?

Thanks in advance!