Can automatic replies to Jott be stopped?

I've been using Jott with Sandy now for a day or so and it is sheer bliss. However, one tiny little thing stands between me and nirvana: everytime I use Jott to send something to Sandy, Sandy replies to Jott and I get an SMS message back on my phone that is basically a receipt message from sandy of what I just sent. It's kinda annoying to me. Is there any way to stop this behavior? I've got all the "send receipt email" options turned off, so I think this is just a Jott behavior.