My Samsung Galaxy S8 Plus has started sending certain individual text as group messages?

[Android Central Question]

If I text the individual on the individual thread, it goes right to the group message. And it shows up in my conversation list as to group messages. 1 will only let me send messages and will not receive them. The other receives messages but if I try to send through it, it will take 10 to 15 minutes to send an awesome does not send at all. The message fails. So to communicate with the individual involved I have to go to one group thread to send and to the other group thread to receive. If I try to start a new thread and delete the others and send only two that recipient it does the same thing. It started with one contact and it moved to three contacts. The only way I was able to fix it was by factory resetting my phone but now after only 2 weeks it is starting again.