iSignature changes email accounts

I dont mind the hassle of going to the iSig app to select a signature, but it when I add the signature, it changes the sending account. It only happens for one of the accounts, as if all signatures have to be sent from a default account. I have two email accounts, therefore two signatures. With account A, I add signature A and send from A. With account B, I add signature B, and it changes the From: line to account A. Anyone know how to fix this? Until this gets fixed, this is useless to me. The best would be a signature in the account set-up. Thanks!

antti2009 about iSignature