Hairy Girl: Shaving Problems

Well I've been hairier than most people since I can remember. I was teased for it most of my life until I finally broke down and started shaving my arms and stomach. I did this for close to two years. Then I decided to grow it out because of how much of a time sucking hassle shaving was. Now I bleach the hair, but the issue is.... When I bleach it, dark hair grows back in. Kind of like roots on blonde hair. I stopped shaving 3-4 months ago. Why does this keep happening?

Also, I have thick leg hair. After shaving the night before, by the next evening my skin will feel slightly prickly. Meaning if I want to show my legs too days in a row I have to shave twice in a row. This causes nasty razor bumps and lots of stress in scheduling my life. Anyone have any tips? I have very pale sensitive skin.. my skin is so see through I can see all the dark follicles so i never show my calves. Anyone?