I have 2 different signatures in Apple Mail. Once of each of my 2 email accounts. However, when I toggle between sending accounts the signatures duplicate each other instead of swapping. IE: Account 1 & Signature 1. I then swap to Account 2 and I get Signature 1 & 2 instead of just 2. My settings are correct and I only have 1 signature per account. Everything worked fine before Yosemite. I have the problem on every Mac I possess. Does anybody else have the same issue?