Thanks Erica, I'm talking about the banner (contact bar or whatever it's called) shown during a conversation, not the home screen banner.

Edit; I added a clarification to original post about the conversation banner.

As two the last last two icons, in my chat with Johb, I sent a message, but it took a while for delivery, after about 30 seconds, his Icon went to the greyed out icon with blue clock, as soon as it was marked delivered, his icon changed to the last icon. Don't see any yellow on mine. I assume as soon as he read it or started typing, it went back to the available icon, but I was in another App at the time. Just explaining what happened while chatting.

Thanks again
Rcbjr