" But if I am coloring the fronts from blonde to 1B and then bleaching the knots why not just order the piece the color I want and save a step by just bleaching the knots?
"

If you read my post again you will see that I said to use a mascara brush to get close to the knotz and IF you happen to get some on the knots, it's easy to remove with bleach because hair dye is easier to bleach out than the carpet dye the factories use to colour them in the beginning.

I can't say it any clearer than that.