GarageBand 101 Editing

After recording a voice track, I go in and remove any long pauses or errors. I've never used GarageBand before, but I have used other editing software. Before, I would highlight the section I wanted removed and hit delete. This works in GarageBand, but it breaks the wave file into 2 pieces. My question is, is there a way to remove what I want to remove without splitting the wave file? I'm going to end up with hundreds of little pieces! Is there a way to merge 2 different wave files on the same line? Maybe that would work.