It does sound like your mix was a little oil rich there! I loaded my boar brush with enough soap to have lather for a 3 pass shave and used only 4-5 drops. I really noticed a difference!

Speaking of lavender, I would stay away from the stuff. It is debatable but has been mentioned on the forum before and there are quite a few articles on it. Apparently prolonged use of lavender can cause a depression of the production of testosterone in men.