>>1696953The "Derpy" method is basically where you don't connect the hair, so the V tips are actually just two separate shapes either crossing over or right at the tips. It is called that because he is the only one who really uses that. The unified method is the more traditional way where you have all the tips connected as one V shape, like it it usually drawn in the original. You have a mix of both and that is the issue, along with all the inconsistency problems he mentioned.
Here is the hair done with the unified method as an example. Take your pick which one you want to use.
This also highlights the consistency issues I mentioned earlier
>>1696573. You need to reduce the amount of nodes you use and to make the nodes/handles parallel. Here is the Ai file for you to look at. It should open in any vector program.
http://www.mediafire.com/download/yl3xdu2goe95jeb/1406516663756.ai 