why did spencer and teddy break up? on the new one there chatting on the computer why not do that?

They broke up because Spencer was with Skyler. So Teddy found out and they broke up. The new episode you were talking about, you must have missed the other episodes. On one other episode, they got back together. The episode that they were talking on the computer, they got back together and chat because they were far away from eachother. Hope this answer helped!!