You are very welcome!* I don't know where you live, but if you are in a warm climate and you are using green leaves, they might heat up and use up some of the nitrogen as they decompose.* Best to grind them up as fine as you can so they decompose quickly.* I'd say to stop the tilling as you will be chopping up the worms and could destroy the tilth (texture) of the soil.* Over-tilling is not a good thing, and some folks don't recommend it at all.
http://www.plantea.com/no-tilling.htm
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.