Is this an Android app? I’m on the iPhone, and as best I can tell there is no app on the iPhone. I did a Google search, and I did find this post, which has a comment posted by a Dial2Do rep:
In it, he explains “There is an auto-responder function within the application which will reply (once) to a contact who sends you a text while the app is reading out your texts (much like an “out of office” message in your email). However his shouldn’t cause spamming as it is completely user configurable and can be switched off at any time.”
Even if that is the case, if a couple of you have run into the same problem, then the options probably aren’t as clear as they should be.