Does not track words correctly and no way to scroll back

Great app, the only 2 gripes I have:

- word tracking doesn't work well, if i repeat a sentence it just goes on at the same speak almost as if i'm in "voice activated" mode where it just respond to sound, not the actual words.
- related to the above, when i repeat a paragraph it keeps scrolling down so there's no way to go back using a mouse drag or scroll