Make sure it was the pure Neatsfoot. It's what I use, and have always used, and it brings out a nice color and softness to my tack.
Tip for oiling- Put your saddle into the sun, and it'll open the pores up. Oil it, and rub it in well. I like to use a little elbow grease, and rub it in well with my hands. Let it soak a little, take it back into the sun to dry it well, and buff over it with a cloth.
I think Hydrophane makes a well liked darkening oil as well.
"You're just as sane as I am."~Luna Lovegood.