Thanks for reaching out, I am aware of my overlapping issue and can say that it was never my intention. I am looking for ways to resolve the issue but wondered if you any possible solutions.
As for my effortless contributions, I was mapping shrub according to the 'shape' of the mountain ranges. Example, take a look at the mountains southeast of Kingman, I was mostly trying to do something similar to the mountains in Pima & Cochise County. 
But, you are the expert here and thank you again for reaching out!