Hi Lundah....So, yesterday when the others were helping I had noticed that the read only string was different and correct that, then followed their advice which didn't work.
Just went to sanity check everything again before I replied to you and saw the read only string had changed back to what it was originally. Switched that back to what it needed to be, disabled the admin group, disabled SNMP, waited 60 seconds, enabled SNMP and enabled the admin group and now both nodes are showing as clear!
One thing I can't remember is if at the top of the web page it normally says "Group alarms clear" or something? Both nodes only say "Node '[node name]' Alarm Status: No Alarm". Is that right and it only changes to group if there's an alarm on one?
Thanks for all the help everyone!