I'm going to assume that you cannot see the screenshot i posted in my question.

Thank you for the answer, however, i wasn't referring to the conversation bubbles.

After creating a group, and adding people to that group, when i vote the list of people in the group, each person has two icons to the far right of the screen. If i tap one icon (the phone), i can call that individual. If i tap the other icon, (the chat bubble), i can send that individual a private text message. It is this chat bubble to which i am referring.

3 people in that list have a gray chat bubble. 1 has a blue chat bubble. That one person does not receive the messages from any of the rest of us in the group. He does receive individual texts. He has an Android, i have an Android, and i know one guy has an iphone (i don't know about the other two).