When you doubled the salt did you use 2 tablspoons of salt in 2 quarts of water?
The recipe trapper posted is different than the others which usually call for 1 tablespoon salt/1 quart water. That one calls for 1 tablespoon salt/2 quarts water and doubling it would meant 2 tablespoons/2 quarts.
I misunderstood when i tried doubling the salt and i used 2 tablespoons of salt in 1 quart of water. I found it the most vile thing i'd ever tasted!