Messages room conversation

Questions
1

Hi,

I don’t know if this is possible but I want to use messages for a group conversation. The problem that I having is when two or more messages arrive a same time they will be toggle under the last person.

Thanks

2

There are first/last message rules parameter functions where you can control it

3

Yes I saw there are two additional classes, but can you explain a little more I don’t see how to use it.
Thanks