Hi SethO,
Please have a look at the F-Curve, and adjust carefully the second keyframe to your linking.
Scene file
https://www.amazon.com/clouddrive/share/LZ7PUsmmDyt5SESvRT8DvlKH5D2Xjj2tvmX6cH70iDD
As the manual states:
Note that some Rules constellations can take two or more generations to generate another visible growth of the L-System.
In other words, it grows, and then not, then grows, then … etc. OR in numbers, your example will grow from 0-1, then from 2-3, then 4-5, but not from 1-2 nor 3-4, etc.
All the best