Skippy花生醬打開後到底要不要放雪櫃（冰箱）？

我在香港買的頂好（Skippy）牌花生醬，招紙上說明，打開後要放雪櫃。但我昨天看它的網站：http://peanutbutter.com，卻有以下的一段：－
SKIPPY® Peanut Butter—opened or not—is happiest when stored at room temperature. You can refrigerate it to savor its flavor for longer, but know that when refrigerated, it doesn’t spread as easily. You should also know that SKIPPY® Peanut Butter doesn’t like being too cold, so keep it freezer-free!

為何有這樣的差別呢？到底哪一種做法才正確呢？