Yes, it is case sensitive.
Good to know - Any idea which is best to use? I've seen LongFast and longfast is different places.
LongFast is the default channel so you have more chances to get contact with people on that channel.
I think part of my problem is I'm using the web app so hopefully get some clarity when I get a proper phone device. Thanks for your help.
Try to use the web UI. Just you have to connect on a wifi and browser mestastastic.local