It doesn't really make sense because you are neither providing a link to the tutorial nor any comparative screenshots with your results. From using different animated properties to simply being zoomed in too far and the resulting display glitches this could be anything. And we do not even know your version of AE or anything about your system.
excellent point, this is my screen- I didn't do exactly what the tutorial says to do because I was trying to free style
around 3:00 is what I want to do
Before you go jumpin' into the deep end of the pool, learn how to swim first in the shallow end:
To put it another way, walk before you run.