I am not new to soaping. I have been making soap for over 9 years. I have a nice small successful soap business. In the last 7 months I have had 2 batches of soap that were around 6 months old change color to a yellow orange and smell awful. This has never happened before. One soap was scented with fragrance oil and oxide colorants, and the other was my unscented uncolored soap. My base recipe is Castor oil 9.68%, Coconut oil 32%, Olive oil 19.35%, Pomace Olive oil 19.35%, Rice Bran oil 19.35%. Any ideas. All my oils have been purchased in the last year, and none of them smell bad.