Hello @Ninja thanks for that. no worries about the link at jomsocial taking the visitor to the old forum - just wanted to point out the link is to an outdated forum and may confuse visitors (like myself!!)
So just to clarify re profiles - when a new user registers they can automatically be assigned a JS profile (and JS group I have set up) depending on / assigned to their Joomla user group.
If they are removed from the Joomla user group then we have to manually remove them from the JS profile and JS group. My question was can this part - the removal - be done automatically or must it be done manually?