Hi there Big-D,
This thread being between wire baits and tying the hair on the baits, Hope we're in the right spot here.
You must be tying some big stuff; a 1/8th oz jig is not that big. I kind of think if you tied the hair on a jig and then bent it back and tied it down again; you must have an awful hump of hair. Don't you get a big clump under the thread when you tie it down on top of the thread?
I've tied many poppers and used to tie jigs, and using just plane ol lacquer cement will hold down any type of hair or thread after it dries, and gives you a nicer looking head or band of thread.
This is just a comment, you can tie anyway you like. There are many ways of getting the job done.
I wish you could put a picture on here so I could see what it looks like.